John Chrysostom
He is not speaking, he says, of some ancient covenant. So that they could not think this, he also defines the time.
He does not simply say, "according to the covenant which I made with their fathers," lest they think of the covenant made with Abraham or with Noah.
Rather, he defines exactly which covenant: "Not like the covenant," he says, "which I made with their fathers at that time," those living at the time of the Exodus.
Therefore he adds, "when I took them by the hand, to lead them out of the land of Egypt. For they did not continue in My covenant, and I disregarded them, says the Lord."
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Do you see that the beginning of evil is from us? "They," he says, from the beginning "did not continue." Therefore negligence is from us, but every good thing, that is, every benefaction, is from God.
Here God, as it were, presents a defense, giving the very reason why He left them.