Exodus 1:11-14 New Revised Standard Version (NRSV)
11 Therefore they set taskmasters over them to oppress them with forced labor. They built supply cities, Pithom and Rameses, for Pharaoh. 12 But the more they were oppressed, the more they multiplied and spread, so that the Egyptians came to dread the Israelites. 13 The Egyptians became ruthless in imposing tasks on the Israelites, 14 and made their lives bitter with hard service in mortar and brick and in every kind of field labor. They were ruthless in all the tasks that they imposed on them.