Leviticus 16:29,31
And this shall be a statute for ever to you: that in the seventh month, on the tenth day of the month, you shall afflict your souls, and do no work at all, whether it be one of your own country, or a stranger that sojournes among you:
Torrey's Topical Textbook—AKJV

Leviticus 23:27
Also on the tenth day of this seventh month there shall be a day of atonement: it shall be an holy convocation to you; and you shall afflict your souls, and offer an offering made by fire to the LORD.
Torrey's Topical Textbook—AKJV