Leviticus 13:27

13:27 The priest must then examine it on the seventh day, and if it is spreading further on the skin, then the priest is to pronounce him unclean. It is a diseased infection.

Leviticus 23:34

23:34 “Tell the Israelites, ‘On the fifteenth day of this seventh month is the Festival of Temporary Shelters for seven days to the Lord.

Leviticus 25:9

25:9 You must sound loud horn blasts – in the seventh month, on the tenth day of the month, on the Day of Atonement – you must sound the horn in your entire land.