Exodus 5:5-8, 20-23

And Pharaoh said, Behold, the people of the land now are many, and ye make them rest from their burdens. And Pharaoh commanded the same day the taskmasters of the people, and their officers, saying, Ye shall no more give the people straw to make brick, as heretofore: let them go and gather straw for themselves. And the tale of the bricks, which they did make heretofore, ye shall lay upon them; ye shall not diminish ought thereof: for they be idle; therefore they cry, saying, Let us go and sacrifice to our God.

And they met Moses and Aaron, who stood in the way, as they came forth from Pharaoh: and they said unto them, The LORD look upon you, and judge; because ye have made our savour to be abhorred in the eyes of Pharaoh, and in the eyes of his servants, to put a sword in their hand to slay us. And Moses returned unto the LORD, and said, Lord, wherefore hast thou so evil entreated this people? why is it that thou hast sent me? For since I came to Pharaoh to speak in thy name, he hath done evil to this people; neither hast thou delivered thy people at all.