Exodus 34:22-24

Young's Literal Translation

²² `And a feast of weeks thou dost observe for thyself; first-fruits of wheat-harvest; and the feast of in-gathering, at the revolution of the year.

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.