Exodus 6:9

and they made their lives bitter with hard slave labor in mortar and bricks and in all kinds of slave labor in the field, all their slave labor which they brutally compelled them to do.

Now it happened in the course of those many days that the king of Egypt died. And the sons of Israel sighed because of the slavery, and they cried out; and their cry for help because of their slavery rose up to God.

“Is this not the word that we spoke to you in Egypt, saying, ‘Leave us alone that we may serve the Egyptians’? For it would have been better for us to serve the Egyptians than for us to die in the wilderness.”