John Gill Commentary Deuteronomy 24:22

"And thou shalt remember that thou wast a bondman in the land of Egypt: therefore I command thee to do this thing." — Deuteronomy 24:22 (ASV)

And you shall remember that you were a bondman in the land
of Egypt
When they would have been glad to have enjoyed the like favours, as small as they might seem to be, even to glean in their fields, vineyards, and oliveyards;

therefore I command you to do this thing ;
to suffer the poor to take the forgotten sheaf, and to come into their oliveyards and vineyards, and gather what olives and grapes remained after the first beating of the one, and the ingathering of the other.