Exodus 1:17-19

But the midwives feared God, and did not do as the king of Egypt had commanded them, but let the boys live. So the king of Egypt called for the midwives and said to them, “Why have you done this thing, and let the boys live?” The midwives said to Pharaoh, “Because the Hebrew women are not as the Egyptian women; for they are vigorous and give birth before the midwife can get to them.”