Exodus 34:23-25

New Revised Standard Version, Anglicised Catholic Edition

²³ Three times in the year all your males shall appear before the Lord God, the God of Israel. ²⁴ For I will cast out nations before you, and enlarge your borders; no one shall covet your land when you go up to appear before the Lord your God three times in the year.

²⁵ You shall not offer the blood of my sacrifice with leaven, and the sacrifice of the festival of the passover shall not be left until the morning.