Exodus 23
14 Ref Three times thou shalt keep a feast unto me in the year.
15 Ref The feast of unleavened bread shalt thou keep: seven days thou shalt eat unleavened bread, as I commanded thee, at the time appointed in the month Abib (for in it thou camest out from Egypt); and none shall appear before me empty:
16 Ref and the feast of harvest, the first-fruits of thy labors, which thou sowest in the field: and the feast of ingathering, at the end of the year, when thou gatherest in thy labors out of the field.
17 Ref Three times in the year all thy males shall appear before the Lord Jehovah.