Shemot 5:8-9

And the matkonet (quota) of the bricks, which they did make heretofore, ye shall lay upon them; ye shall not diminish ought thereof; for they are idle; therefore they cry out, saying, Let us go and sacrifice to Eloheinu. Let there more avodah be laid upon the anashim, that they may labor therein; and let them not regard divrei sheker.