Exodus 3:21 And I will give this people favour in the sight of the Egyptians: and it shall come to pass, that, when ye go, ye shall not go empty: 22 But every woman shall borrow of her neighbour, and of her that sojourneth in her house, jewels of silver, and jewels of gold, and raiment: and ye shall put them upon your sons, and upon your daughters; and ye shall spoil the Egyptians.
God gave His people favor with the Egyptians. As they left the country they were given all sorts of goods, slier, gold, clothing, etc. They borrowed it never to be repaid. They spoiled the Egyptians.
Now they may not have thought it later, like you do not. But God was providing what would be needed to build the Tabernacle. He will later take an offering. Everyone will have to give because of how God caused the Egyptians to give to them as they left.
Have you ever thought that God is so richly blessing you now because He has a job for you to do tomorrow.Maybe your blessings today will bless the work of God tomorrow.