Leviticus 23:20-24

The priest shall then wave them with the bread of the first fruits as a wave offering with two lambs before the Lord; they are to be holy to the Lord for the priest.

On this very day you shall make a proclamation as well; you are to have a holy convocation. You shall do no laborious work. It is to be a permanent statute in all your dwelling places throughout your generations.

‘When you reap the harvest of your land, moreover, you shall not reap to the very edges of your field nor gather the gleaning of your harvest; you are to leave them for the needy and the stranger. I am the Lord your God.’ ”

Again the Lord spoke to Moses, saying,

“Speak to the sons of Israel, saying, ‘In the seventh month on the first of the month you shall have a rest, a reminder by blowing of trumpets, a holy convocation.