Exodus 5:9, 19, 23

Let heavier work be laid upon the men, that they may labor therein; and let them not regard lying words.

And the officers of the children of Israel did see that they were in evil case, when it was said, Ye shall not diminish aught from your bricks, your daily tasks.

For since I came to Pharaoh to speak in thy name, he hath dealt ill with this people; neither hast thou delivered thy people at all.