and they ¹  made the Israelites serve rigorously. ² 

biblegateway Exo 1:13

The Egyptians compelled the sons of Israel to labor rigorously;

They worked the Israelites ruthlessly

So they forced the Israelites to work hard as slaves.

biblegateway Exo 1:13

and worked them ruthlessly.

So they ruthlessly made the people of Israel work as slaves

bibleoremus Exo 1:13

The Egyptians became ruthless in imposing tasks on the Israelites,

They ground down their Israelite slaves,

biblegateway Exo 1:13

So the Egyptians made the children of Israel serve with rigor.

And the Egyptians made the children of Israel to serve with rigour:

biblegateway Exo 1:13

and they ¹  made the Israelites serve rigorously. ² 

¹ tn Heb “the Egyptians.” For stylistic reasons this has been replaced by the pronoun “they” in the translation.

² tn Heb “with rigor, oppression.”