Exodus 23:14 KJV
Three times thou shalt keep a feast unto me in the year.
Exodus 23:15 KJV
Thou shalt keep the feast of unleavened bread:  thou shalt eat unleavened bread seven days, as I commanded thee,  in the time appointed of the month Abib; for in it thou camest out from Egypt: and none shall appear before me empty:)
Exodus 23:16 KJV
 And the feast of harvest, the firstfruits of thy labours, which thou hast sown in the field: and the  feast of ingathering, which is in the end of the year, when thou hast gathered in thy labours out of the field.