Leviticus 5:8

5:8 He must bring them to the priest and present first the one that is for a sin offering. The priest must pinch its head at the nape of its neck, but must not sever the head from the body.

Leviticus 9:15

The Offerings for the People

9:15 Then he presented the people’s offering. He took the sin offering male goat which was for the people, slaughtered it, and performed a decontamination rite with it like the first one.

Leviticus 23:24

23:24 “Tell the Israelites, ‘In the seventh month, on the first day of the month, you must have a complete rest, a memorial announced by loud horn blasts, a holy assembly.