Numbers 28:17
“And in the fifteenth day of this month is the feast: seven days shall unleavened bread be eaten.”
And one kid of the goats for a sin offering unto the Lord shall be offered, beside the continual burnt offering, and his drink offering.
And in the fourteenth day of the first month is the passover of the Lord.
And in the fifteenth day of this month is the feast: seven days shall unleavened bread be eaten.
In the first day shall be an holy convocation; ye shall do no manner of servile work therein:
But ye shall offer a sacrifice made by fire for a burnt offering unto the Lord; two young bullocks, and one ram, and seven lambs of the first year: they shall be unto you without blemish:
Counter-Arguments
The strongest case that this verse does not belong in this theme.

Cross-References
“Seven days shall ye eat unleavened bread; even 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.”
“And on the fifteenth day of the same month is the feast of unleavened bread unto the Lord: seven days ye must eat unleavened bread.”
“Seven days thou shalt eat unleavened bread, and in the seventh day shall be a feast to the Lord.”
“And on the fifteenth day of the same month is the feast of unleavened bread unto the Lord: seven days ye must eat unleavened bread.”
“Thou shalt eat no leavened bread with it; seven days shalt thou eat unleavened bread therewith, even the bread of affliction; for thou camest forth out of the land of Egypt in haste: that thou mayest remember the day when thou camest forth out of the land of Egypt all the days of thy life.”