Leviticus 23
5 Ref In the first month, on the fourteenth day of the month at even, is Jehovah's passover.
6 Ref And on the fifteenth day of the same month is the feast of unleavened bread unto Jehovah: seven days ye shall eat unleavened bread.
7 Ref In the first day ye shall have a holy convocation: ye shall do no servile work.