Exodus 23:16-18

Revised Standard Version

¹⁶ You shall keep the feast of harvest, of the first fruits of your labor, of what you sow in the field. You shall keep the feast of ingathering at the end of the year, when you gather in from the field the fruit of your labor. ¹⁷ Three times in the year shall all your males appear before the Lord God.

¹⁸ “You shall not offer the blood of my sacrifice with leavened bread, or let the fat of my feast remain until the morning.