18 In the first month, on the fourteenth day of the month at even, ye shall eat unleavened bread, until the one and twentieth day of the month at even.
Exodus 12:18 Cross References - JPS_ASV_Byz
Exodus 12:1-2
Exodus 12:15
15 Seven days shall ye eat unleavened bread; howbeit the first day ye shall put away leaven out of your houses; for whosoever eateth leavened bread from the first day until the seventh day, that soul shall be cut off from Israel.
Leviticus 23:5-8
5 In the first month, on the fourteenth day of the month at dusk, is the LORD'S passover.
6 And on the fifteenth day of the same month is the feast of unleavened bread unto the LORD; seven days ye shall eat unleavened bread.
7 In the first day ye shall have a holy convocation; ye shall do no manner of servile work.
8 And ye shall bring an offering made by fire unto the LORD seven days; in the seventh day is a holy convocation; ye shall do no manner of servile work.
Numbers 28:16-25
16 And in the first month, on the fourteenth day of the month, is the LORD'S passover.
17 And on the fifteenth day of this month shall be a feast; seven days shall unleavened bread be eaten.
18 In the first day shall be a holy convocation; ye shall do no manner of servile work;
19 but ye shall present an offering made by fire, a burnt-offering unto the LORD: two young bullocks, and one ram, and seven he- lambs of the first year; they shall be unto you without blemish;
20 and their meal-offering, fine flour mingled with oil; three tenth parts shall ye offer for a bullock, and two tenth parts for the ram;
21 a several tenth part shalt thou offer for every lamb of the seven lambs;
22 and one he-goat for a sin-offering, to make atonement for you.
23 Ye shall offer these beside the burnt-offering of the morning, which is for a continual burnt-offering.
24 After this manner ye shall offer daily, for seven days, the food of the offering made by fire, of a sweet savour unto the LORD; it shall be offered beside the continual burnt-offering, and the drink-offering thereof.
25 And on the seventh day ye shall have a holy convocation; ye shall do no manner of servile work.