Rashi on Deuteronomy 15:15/רש"י על דברים ט״ו:ט״ו

1וזכרת כי עבד היית AND THOU SHALT REMEMBER THAT THOU WAST A SERVANT [IN THE LAND OF EGYPT] — and I loaded thee with good things, and did so a second time — from the spoil of the land of Egypt and from the spoil at the Red Sea; so you, too, load him once, and do it again for him (Sifrei Devarim 120:1).