Nevertheless I will remember my covenant with thee in the
of thy youth
The covenant made with them at Sinai, quickly after they came out of Egypt, when they were, both as a body politic and ecclesiastical, in their infant state; for, as Kimchi says, all the while they were in Egypt, and until they, came into the land of Canaan, were called the days of their youth; and to this covenant, which had the nature of a matrimonial contract, the, prophet refers when he speaks of the "love" of their "espousals", and the "kindness" of their "youth", ( Jeremiah 2:2 ) ; this covenant the Lord remembered, and made good his part, though they neglected theirs; and it was particularly remembered when Christ was made under this law, and became the fulfilling end of it to his people; yielding perfect obedience to it, and bearing the penalty of it in their room and stead; for here begins a declaration of the grace and mercy of God to the remnant, according to the election of grace, which were among this degenerate people, and whom the Lord had a special regard unto: and I will establish unto thee an everlasting covenant;
the covenant of grace, made with the Messiah and his spiritual seed; which is confirmed of God in Christ; ordered in all things and sure; whose promises are yea and amen in Christ; and the blessings of it, the sure mercies of David; a covenant that shall never be broken, made void, or removed; but will continue for ever. This is the new covenant, or the covenant of grace, as exhibited and administered under the New Testament; see ( Hebrews 8:8-13 ) .