Exodus 23:14

but the seventh year you shall let it rest and lie fallow, that the poor of your people may eat; and what they leave the animal of the field shall eat. In the same way, you shall deal with your vineyard and with your olive grove.

“Six days you shall do your work, and on the seventh day you shall rest, that your ox and your donkey may have rest, and the son of your servant, and the alien may be refreshed.

“Be careful to do all things that I have said to you; and don’t invoke the name of other gods or even let them be heard out of your mouth.

You shall observe the feast of unleavened bread. Seven days you shall eat unleavened bread, as I commanded you, at the time appointed in the month Abib (for in it you came out of Egypt), and no one shall appear before me empty.

And the feast of harvest, the first fruits of your labors, which you sow in the field; and the feast of ingathering, at the end of the year, when you gather in your labors out of the field.

Three times in the year all your males shall appear before the Lord GOD.