They remembered not his hand. The sacred writer still continues to upbraid the Israelites; for the simple remembrance of God's benefits might have restrained them, had they not wilfully and perversely forgotten whatever they had experienced. From this impious forgetfulness proceed waywardness and all rebellion. The hand of God, as is well known, is by the figure metonomy taken for his power. In the deliverance of the chosen tribes from Egypt here celebrated, the hand of God was stretched forth in a new and an unusual manner. And their impiety, against which the prophet now inveighs, was rendered the more detestable, from the fact that they accounted as nothing, or soon forgat, that which no length of time ought to have effaced from their memory. Farther, he recounts certain examples of the power of God, which he calls first signs, and then miracles, (verse 43,) that, by the recital of these, he may again rebuke the shameful stupidity of the people. By both these words he expresses the same thing; but in the second clause of the verse, the word miracles gives additional emphasis, implying that, by such strange and unheard-of events, the Egyptians had at that time been stricken with such terror as ought not to have vanished so speedily from the minds of the Israelites.

They remembered not his hand - His gracious interpositions; the manifestations of his power. They forgot that power had been exercised which showed that he was omnipotent - that there was no limit to his ability to aid them.
Nor the day when he delivered them from the enemy - The time when he rescued them. The power then manifested was sufficient to defend and deliver them in any new dangers that could befall them. The margin is, from affliction. The Hebrew will admit of either interpretation. The sense is not materially changed.

They (a) remembered not his hand, [nor] the day when he delivered them from the enemy.
(a) The forgetfulness of God's benefits is the root of rebellion and all vice.

They remembered not his hand,.... Which brought them out of Egypt, and dashed their enemies in pieces, and which had been so often opened to supply their wants in the wilderness; the Targum renders it, the miracles of his hand:
nor the day when he delivered them from the enemy; Pharaoh king of Egypt; that very memorable day in which they were delivered out of his hands, that selfsame day which had been fixed, by promise and prophecy many hundreds of years before, in which the hosts of the Lord went out of Egypt, Exodus 12:41, times when as well as places where deliverances and salvation have been wrought should not be forgotten; and forgetfulness of the goodness of God in times past is often the cause and occasion of sinning against him, which, by a remembrance of his kind appearances, might be prevented.

Hand - The glorious works of his hand. Enemy - That remarkable day, in which God delivered them from their greatest enemy, Pharaoh.