So they put slave masters over them to oppress them with forced labor, and they built Pithom and Rameses as store cities for Pharaoh.
NIV
So they set over [the Israelites] taskmasters to afflict and oppress them with [increased] burdens. And [the Israelites] built Pithom and Rameses as store cities for Pharaoh.
AMP
Therefore they did set over them taskmasters to afflict them with their burdens. And they built for Pharaoh treasure cities, Pithom and Raamses.
KJV