en_tn/exo/13/11.md

and when he gives the land to you

AT: "and when he gives the land of the Canaanites to you"

Every firstborn of a donkey...

Israel is given a choice to kill the firstborn donkey or buy it back with a lamb.

each of your firstborn males among all your sons ...

Every one in Israel who had a firstborn son, must buy him back.