Strong H6531 פֶּ֫רֶךְ perek · severity

Exodus

1. Exodus 1:13
   And the Egyptians made the children of Israel to serve with rigour:
2. Exodus 1:14
   And they made their lives bitter with hard bondage, in morter, and in brick, and in all manner of service in the field: all their service, wherein they made them serve, was with rigour.