Numbers 29:12
On the fifteenth day of the seventh month, you are to hold a sacred assembly; you must not do any regular work, and you shall observe a feast to the LORD for seven days.
Berean Standard Bible
And on the fifteenth day of the seventh month ye shall have an holy convocation; ye shall do no servile work, and ye shall keep a feast unto the LORD seven days:
“‘On the fifteenth day of the seventh month you shall have a holy convocation. You shall do no regular work. You shall keep a feast to the LORD seven days.