The Israelites had already done what Moses had told them to do. They had gone to their Egyptian neighbors and asked for gold and silver and for clothes.
(SEE 15:13)
Then he gave clothing, as well as silver and gold jewelry, to Rebekah. He also gave expensive gifts to her brother and her mother.
The others helped by giving silver articles, gold, personal possessions, cattle, and other valuable gifts, as well as offerings for the temple.
When God led Israel from Egypt, they took silver and gold, and no one was left behind.
Then they left and did what Moses and Aaron had told them to do.
There is a time for finding and losing, keeping and giving,