Leviticus 23:23-26

The LORD said to Moses, “Give the following instructions to the people of Israel. On the first day of the appointed month in early autumn, you are to observe a day of complete rest. It will be an official day for holy assembly, a day commemorated with loud blasts of a trumpet. You must do no ordinary work on that day. Instead, you are to present special gifts to the LORD.” Then the LORD said to Moses