Exodus 13:2 commands the consecration of firstborn — the basis for why firstborn animals here are already the Lord's.

Exodus 13:12 repeats the command to set apart firstborn males — reinforcing that they belong to God.

Exodus 22:30 instructs giving firstborn to God on the eighth day — specifying when they become the Lord's.

Numbers 18:17 states firstborn of clean animals are holy and not to be redeemed — directly parallel to the rule here.

Deuteronomy 15:19 commands dedicating firstborn males to the Lord — aligning with the principle that they are the Lord's.

Numbers 3:13 declares all firstborn mine because of the Exodus event — the theological basis for the rule here.

Numbers 8:17 repeats the declaration that firstborn belong to God due to the plague in Egypt — reinforcing the basis.

Numbers 18:15 expands on firstborn belonging to the Lord, specifying they are given to priests—consistent with Leviticus 27:26 that firstborn cannot be dedicated.

Nehemiah 10:36 records the people's pledge to bring firstborn of sons and cattle, directly obeying the law stated in Leviticus 27:26.

Exodus 13:13 provides redemption rules for firstborn donkeys and sons — an additional layer of firstborn law beyond the rule here.