God promised Moses that when the Israelites were released from slavery, their women would carry from the land jewelry of silver and gold given to them by the Egyptians.
Some interpreters believer these precious items were payment for the labor the Egyptians had taken from the Israelite slaves. But they had little use for jewelry while living in the desert.
After several years in the wilderness of Sinai, the Israelites donated their items of gold and silver for the building of the tabernacle (Exodus 35:22). Perhaps this was the purpose God had in mind for this jewelry all along.
EXODUS 3:21-22 – When ye [Israelites] go, ye shall not go empty [empty-handed, NIV]: but every woman shall borrow of her neighbor. . .jewels of silver, and jewels of gold, and raiment [clothing, NIV]. . .and ye shall spoil [plunder, NIV] the Egyptians.