Exodus 13:13
13 eEvery firstborn of a donkey you shall redeem with a lamb, or if you will not redeem it you shall break its neck. Every ffirstborn of man among your sons you shall redeem.
Exodus 34:20
20 The ffirstborn of a donkey you shall redeem with a lamb, or if you will not redeem it you shall break its neck. All the firstborn of your sons you shall redeem. And gnone shall appear before me empty-handed.