Numbers 28:25

28:25 On the seventh day you are to have a holy assembly, you must do no regular work.

Numbers 29:32

29:32 “‘On the seventh day you must offer seven bulls, two rams, and fourteen lambs one year old, all without blemish,

Numbers 31:24

31:24 You must wash your clothes on the seventh day, and you will be ceremonially clean, and afterward you may enter the camp.’”