Exodus 23:15

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:

Exodus 23:15 In-Context

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.
The American Standard Version is in the public domain.