Exodus 1:9 DBY

⁷  And the children of Israel were fruitful, and swarmed and multiplied, and became exceeding strong; and the land was full of them.

⁸  And there arose a new king over Egypt, who did not know Joseph.

⁹  And he said to his people, Behold, the people of the children of Israel are more numerous and stronger than we.

¹⁰  Come on, let us deal wisely with them, lest they multiply, and it come to pass that, if war occur, they take side with our enemies and fight against us, and go up out of the land.

¹¹  And they set over them service-masters to oppress them with their burdens. And they built store-cities for Pharaoh, Pithom and Rameses.