Exodus 23:14-17

14“Three times a year you must celebrate a pilgrimage festival in my honor.

15“Celebrate the Festival of Unleavened Bread: For seven days you must eat unleavened bread, as I commanded you. Do this at the appointed time in the month of Abib, because that was when you left Egypt. No one may come into my presence without an offering.

16“Celebrate the Festival of the Harvest with the first produce harvested from whatever you plant in your fields. “Celebrate the Festival of the Final Harvest at the end of the year when you harvest your crops from the fields.

17“These are the three times each year that all your men must come into the presence of the Master, the Lord.