Exodus 1:12-14, 22

But the more they were oppressed, the more they multiplied and the more they spread abroad. And the Egyptians were in dread of the people of Israel. So they ruthlessly made the people of Israel work as slaves and made their lives bitter with hard service, in mortar and brick, and in all kinds of work in the field. In all their work they ruthlessly made them work as slaves.

Then Pharaoh commanded all his people, “Every son that is born to the Hebrews you shall cast into the Nile, but you shall let every daughter live.”