Exodus 1:7-10
but the Israelites were exceedingly fruitful; they multiplied greatly, increased in numbers and became so numerous that the land was filled with them.
8Then a new king, to whom Joseph meant nothing, came to power in Egypt. 9“Look,” he said to his people, “the Israelites have become far too numerous for us. 10Come, we must deal shrewdly with them or they will become even more numerous and, if war breaks out, will join our enemies, fight against us and leave the country.”

Exodus 12:35-36
The Israelites did as Moses instructed and asked the Egyptians for articles of silver and gold and for clothing. 36The Lord had made the Egyptians favorably disposed toward the people, and they gave them what they asked for; so they plundered the Egyptians.