Leviticus 5:8

And he shall bring them unto the priest, who shall offer that which is for the sin offering first, and wring off his head from his neck, but shall not divide it asunder:

Cross-reference

Leviticus 5:7 introduces the two-bird offering; verse 8 then details the first bird's handling—a direct sequential instruction.

Leviticus 1:15 gives the same wringing procedure for a burnt offering bird, confirming the ritual technique for bird offerings.

Numbers 6:11 commands the same two-bird sin and burnt offering for a Nazirite, mirroring the pattern in Leviticus 5:7-8.