Exodus 23:13-15

American Standard Version

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: