Exodus 1 : 8-14, 22
Then a new king who had not known Joseph came to power and said to his people, “The Israelites are numerous and stronger than we are. Let us deal warily with them lest they increase still more and, in case of war, side with our enemy, fight against us and escape from the land.”
So they set taskmasters over them to oppress them with forced labour. In that way they built the storage towns of Pithom and Rameses. But the more they oppressed the Hebrews the more they increased and spread, until the Egyptians dreaded the Israelites and became ruthless in making them work.
They made life bitter for them in hard labour with bricks and mortar and with all kinds of work in the fields. In all their work the Egyptians treated them harshly.
Pharaoh then gave this order to all the people : “Every infant boy born to the Hebrews must be thrown into the Nile, but every girl may live.”