Exodus 23:15 ASV

¹³  And in all things that I have said unto you take ye heed: and make no mention of the name of other gods, neither let it be heard out of thy mouth.

¹⁴  Three times thou shalt keep a feast unto me in the year.

¹⁵  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  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  Three times in the year all thy males shall appear before the Lord Jehovah.