Exodus 34:23-25

Young's Literal Translation

²³ `Three times in a year do all thy males appear before the Lord Jehovah, God of Israel;

²⁴ for I dispossess nations from before thee, and have enlarged thy border, and no man doth desire thy land in thy going up to appear before Jehovah thy God three times in a year.

²⁵ `Thou dost not slaughter with a fermented thing the blood of My sacrifice; and the sacrifice of the feast of the passover doth not remain till morning: