Psalms 106:7

7Our fathers understood not thy wonders in Egypt, Here he relates how the people immediately, from the very commencement of their emancipation from bondage, were ungrateful to God, and conducted themselves in a rebellious manner. Nor does he confine himself to the history of one period only, but the whole drift of his narrative is to point out that the people had never ceased from doing wickedly, although God met them in return with inconceivable kindness; which is a proof of the invincible and desperate perversity of this nation. He first blames the folly of the people as the occasion of such ingratitude. In calling it folly, he does not intend to lessen the offense, (as some are often wont to do,) but to expose the vile and disgraceful stupidity of the people, in being blind in matters so plain; for God’s works were such that even the blind might behold them. Whence could such gross ignorance originate, unless that Satan had so maddened them that they did not regard the miracles of God, which might have moved the very stones? Now, when he adds, they remembered not, he expresses more forcibly the inexcusable nature of their ignorance, nay, that their blindness was the result of stupid indifference, more than the want of proper instruction. For the cause of their ignorance was their overlooking those matters which, in themselves, were abundantly manifest. He further mentions how quickly that forgetfulness came upon them, which tended to increase their guilt. For it was marvelous that not even the very sight of these things could arouse their spirits. Hence it came to pass, that while they had scarcely made their departure from Egypt, and were passing through the sea, they proudly rose up against their deliverer. Surely not one year, nor even a century, ought to have erased from their minds deeds so worthy of being remembered. What madness, then, at that very time to murmur against God, as if he had abandoned them to be slaughtered by their enemies? That arm of the sea through which the people passed is, in the Hebrew, called the Sea of Suph. Some translate it the Sea of Sedge, and will have the word סופ, suph, to signify sea-weed. (244) But whatever be its derivation, there can be no doubt about the place. It is very likely that the name was given to it because it abounded with rushes.