דברים טו:טו פירוש: רש״י, ספורנו, רשב״ם ורבנו בחיי

וזכרת 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).

וזכרת כי עבד היית, not only did He take you out of bondage, but He saw to it that you were generously endowed with gold, silver, garments, etc.

כי עבד היית, and He took you out with great wealth.