The Feast of Tabernacles: First and Last Days of, Holy Convocations
Source: TTT
Leviticus 23:35, 39
On the first day there shall be a sacred assembly. You must not do any regular work. / On the fifteenth day of the seventh month, after you have gathered the produce of the land, you are to celebrate a feast to the LORD for seven days. There shall be complete rest on the first day and also on the eighth day.
Numbers 29:12, 35
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. / On the eighth day you are to hold a solemn assembly; you must not do any regular work.