Rashi on Exodus 6:5/רש"י על שמות ו׳:ה׳

1וגם אני — Since I established and set up My covenant it is incumbent upon Me to fulfil it; therefore, שמעתי את נאקת בני ישראל I HAVE HEARD THE GROANING OF THE CHILDREN OF ISRAEL who groan (complain) אשר מצרים מעבדים אתם THAT THE EGYPTIANS ARE ENSLAVING THEM, ואזכר AND I REMEMBER that covenant which I have already made with them; because at the covenant “between the pieces” I said to him, (Genesis 15:14) “And also against that nation whom they shall serve will I pronounce judgment.”