And they remembered that God was their helper: and the most high God their redeemer.

And they remember that God is their rock, And God Most High their redeemer.

In the memory that God was their Rock, and the Most High God their saviour.

And they remembered that God was their Rock - See Deuteronomy 32:4, Deuteronomy 32:15, Deuteronomy 32:31. Compare the notes at Psalm 18:2. That is, they were brought to reflect that their only security and defense was God. They were made to feel that they could not rely on themselves, or on any human power, and that their only trust was in God.
And the high God their Redeemer - The God who is exalted over all; the true and living God. The truth was brought to their recollection that it was He who had delivered them from bondage in Egypt, and who had brought them out into freedom. On the word "Redeemer," see the notes at Isaiah 41:14. Compare Isaiah 43:14; Isaiah 44:6, Isaiah 44:24; Isaiah 47:4; Isaiah 59:20; Psalm 25:22; Job 5:20.

That God was their rock - They recollected in their affliction that Jehovah was their Creator, and their Father; the Rock, the Source, not only of their being, but of all their blessings; or, that he was their sole Protector.
And the high God their Redeemer - ואל עליון גאלם veel elyon goalam, "And the strong God the Most High, their kinsman." That one who possessed the right of redemption; the nearest akin to him who had forfeited his inheritance; so the word originally means, and hence it is often used for a redeemer. The Hebrew word גאל goel answers to the Greek σωτηρ, a savior; and is given to the Lord Jesus Christ, the strong God, the Most High, the Redeemer of a lost world. After this verse there is the following Masoretic note: חצי הספר chatsi hassepher, "The middle of the book." And thus the reader has arrived at the middle of the Psalter, a book for excellence unparalleled.

And they remembered that God was their Rock,.... Who had delivered them out of the hands of their enemies, had strengthened them against them, and supported and protected them, as well as supplied them with all good things, of whom they had been greatly unmindful; but affliction was a means of refreshing their memory; see Deuteronomy 32:15,
and the high God their Redeemer; who had redeemed them out of Egypt, out of the house of bondage, with a high hand and a mighty arm, and thereby showed himself to be the most high God: between this and the following verse the Masorah puts this note,
"half of the book,''
i.e. half of the book of Psalm ends here.

Redeemer - That God alone had preserved them in all their former exigencies, and that he only could help them.