Exodus 23:16-18

King James Version

¹⁶ And the feast of harvest, the firstfruits of thy labours, which thou hast sown in the field: and the feast of ingathering, which is in the end of the year, when thou hast gathered in thy labours out of the field.

¹⁷ Three times in the year all thy males shall appear before the Lord God.

¹⁸ Thou shalt not offer the blood of my sacrifice with leavened bread; neither shall the fat of my sacrifice remain until the morning.