Exodus 23:15–18

15 qYou shall keep the Feast of Unleavened Bread. As I commanded you, you shall eat unleavened bread for seven days at the appointed time in the month of rAbib, for in it you came out of Egypt. sNone shall appear before me empty-handed. 16 You shall keep tthe Feast of Harvest, of the firstfruits of your labor, of what you sow in the field. You shall keep the uFeast of Ingathering at the end of the year, when you gather in from the field the fruit of your labor. 17 pThree times in the year shall all your males appear before the Lord God.

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