They soon forgat his works - On Psalm 106:13-15, see the notes at Psalm 78:17-22. Literally, here, as in the margin, "They made haste, they forgat." They did it soon; did it without any delay. It was as if they were impatient to have it done.
They waited not for his counsel - For the fulfillment of his promise; or for his command in regard to their future conduct. They did not look to him, but they depended on themselves, and followed their own desires and wishes.

They soon forgat his works - Three days afterwards, at the waters of Marah, Exodus 15:24.
They waited not for his counsel - They were impatient, and would not wait till God should in his own way fulfll his own designs.

They soon forgat his works; they waited not for his (g) counsel:
(g) The would prevent his wisdom and providence.

They soon forgat his works,.... The miracles he wrought in Egypt, the deliverance of them from thence with a mighty hand and outstretched arm, and the leading them through the Red sea as on dry land, and destroying all their enemies; all these they soon forgot, for they had gone but three days' journey into the wilderness after this, ere they began to murmur and show distrust of the power and providence of God, Exodus 15:22, it is in the Hebrew text, "they made haste, they forgat his works" (o); as soon as they were out of Egypt, they were for entering into the land of Canaan at once, and were much displeased that they were not immediately led into it.
They waited not for his counsel; they did not ask counsel of God, though it belongs to him, and he is wonderful in it, and does all things after the counsel of his own will; nor would they take it when given by Moses and Joshua; they did not choose to wait his time and way of working; they were for limiting the Holy One of Israel to their time and way; they were for being in the land of Canaan before his time; and were for eating flesh, when it was his counsel to feed on manna he provided for them every day.
(o) "festinaverunt, obliti sunt", Pagninus, Montanus, Vatablus, &c.

Those that will not wait for God's counsel, shall justly be given up to their own hearts' lusts, to walk in their own counsels. An undue desire, even for lawful things, becomes sinful. God showed his displeasure for this. He filled them with uneasiness of mind, terror of conscience, and self-reproach. Many that fare deliciously every day, and whose bodies are healthful, have leanness in their souls: no love to God, no thankfulness, no appetite for the Bread of life, and then the soul must be lean. Those wretchedly forget themselves, that feast their bodies and starve their souls. Even the true believer will see abundant cause to say, It is of the Lord's mercies that I am not consumed. Often have we set up idols in our hearts, cleaved to some forbidden object; so that if a greater than Moses had not stood to turn away the anger of the Lord, we should have been destroyed. If God dealt severely with Moses for unadvised words, what do those deserve who speak many proud and wicked words? It is just in God to remove those relations that are blessings to us, when we are peevish and provoking to them, and grieve their spirits.

The faith induced by God's display of power in their behalf was short lived, and their new rebellion and temptation was visited by God with fresh punishment, inflicted by leaving them to the result of their own gratified appetites, and sending on them spiritual poverty (Numbers 11:18).
They soon forgat--literally, "They hasted, they forgat" (compare Exodus 32:8). "They have turned aside quickly (or, hastily) out of the way." The haste of our desires is such that we can scarcely allow God one day. Unless He immediately answers our call, instantly then arise impatience, and at length despair.
his works-- (Deuteronomy 11:3-4; Daniel 9:14).
his counsel--They waited not for the development of God's counsel, or plan for their deliverance, at His own time, and in His own way.

The first of the principal sins on the other side of the Red Sea was the unthankful, impatient, unbelieving murmuring about their meat and drink, Psalm 106:13-15. For what Psalm 106:13 places foremost was the root of the whole evil, that, falling away from faith in God's promise, they forgot the works of God which had been wrought in confirmation of it, and did not wait for the carrying out of His counsel. The poet has before his eye the murmuring for water on the third day after the miraculous deliverance (Exodus 15:22-24) and in Rephidim (Exodus 17:2). Then the murmuring for flesh in the first and second years of the exodus which was followed by the sending of the quails (Ex. 16 and Numbers. 11), together with the wrathful judgment by which the murmuring for the second time was punished (Kibrôth ha-Ta'avah, Numbers 11:33-35). This dispensation of wrath the poet calls רזון (lxx, Vulgate, and Syriac erroneously πλησμονήν, perhaps מזון, nourishment), inasmuch as he interprets Numbers 11:33-35 of a wasting disease, which swept away the people in consequence of eating inordinately of the flesh, and in the expression (cf. Psalm 78:31) he closely follows Isaiah 10:16. The "counsel" of God for which they would not wait, is His plan with respect to the time and manner of the help. חכּה, root Arab. ḥk, a weaker power of Arab. ḥq, whence also Arab. ḥkl, p. 111, ḥkm, p. 49 note 1, signifies prop. to make firm, e.g., a knot (cf. on Psalm 33:20), and starting from this (without the intervention of the metaphor moras nectere, as Schultens thinks) is transferred to a firm bent of mind, and the tension of long expectation. The epigrammatic expression ויּתאוּוּ תאוה (plural of ויתאו, Isaiah 45:12, for which codices, as also in Proverbs 23:3, Proverbs 23:6; Proverbs 24:1, the Complutensian, Venetian 1521, Elias Levita, and Baer have ויתאו without the tonic lengthening) is taken from Numbers 11:4.
The second principal sin was the insurrection against their superiors, Psalm 106:16-18. The poet has Numbers 16:1 in his eye. The rebellious ones were swallowed up by the earth, and their two hundred and fifty noble, non-Levite partisans consumed by fire. The fact that the poet does not mention Korah among those who were swallowed up is in perfect harmony with Numbers 16:25., Deuteronomy 11:6; cf. however Numbers 26:10. The elliptical תפתּה in Psalm 106:17 is explained from Numbers 16:32; Numbers 26:10.
The third principal sin was the worship of the calf, Psalm 106:19-23. The poet here glances back at Ex. 32, but not without at the same time having Deuteronomy 9:8-12 in his mind; for the expression "in Horeb" is Deuteronomic, e.g., Deuteronomy 4:15; Deuteronomy 5:2, and frequently. Psalm 106:20 is also based upon the Book of Deuteronomy: they exchanged their glory, i.e., the God who was their distinction before all peoples according to Deuteronomy 4:6-8; Deuteronomy 10:21 (cf. also Jeremiah 2:11), for the likeness (תּבנית) of a plough-ox (for this is pre-eminently called שׁוּר, in the dialects תּור), contrary to the prohibition in Deuteronomy 4:17. On Psalm 106:21 cf. the warning in Deuteronomy 6:12. "Land of Cham" = Egypt, as in Psalm 78:51; Psalm 105:23, Psalm 105:27. With ויאמר in Psalm 106:23 the expression becomes again Deuteronomic: Deuteronomy 9:25, cf. Exodus 32:10. God made and also expressed the resolve to destroy Israel. Then Moses stepped into the gap (before the gap), i.e., as it were covered the breach, inasmuch as he placed himself in it and exposed his own life; cf. on the fact, besides Ex. 32, also Deuteronomy 9:18., Psalm 10:10, and on the expression, Ezekiel 22:30 and also Jeremiah 18:20.

Soon - Even within three days, Exodus 15:22-23. Waited not - They did not wait patiently upon God for supplies, in such manner and time as he thought fit.