Leviticus 11:23
But all other flying creeping things, which have four feet, shall be an abomination unto you.
Cross-reference
Leviticus 11:20
Parallel
Leviticus 11:20 introduces flying creeping things on four feet; verse 23 repeats and clarifies the same category.
Leviticus 11:27
Related theme
Leviticus 11:27 deals with beasts that go on paws, a different category but same principle of uncleanness.
Leviticus 11:41
Related theme
Leviticus 11:41 expands to creeping things on earth, similar category of abominable creatures.