Exodus 1:11, 15-17, 8

And so he set over them masters of the works, in order to afflict them with burdens. And they built for Pharaoh the cities of the tabernacles: Pithom and Raamses.

Then the king of Egypt spoke to the midwives of the Hebrews, (one of whom one was called Shiphrah, another Puah) instructing them: "When you will act as a midwife to the Hebrew women, and the time of delivery has arrived: if it is male, put it to death; if it is female, retain it." But the midwives feared God, and so they did not act according to the precept of the king of Egypt, but they kept the males safe.

Meanwhile, there arose a new king over Egypt, who was ignorant of Joseph.