Leviticus 23:6
“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.”
These are the feasts of the Lord, even holy convocations, which ye shall proclaim in their seasons.
In the fourteenth day of the first month at even is the Lord’s passover.
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.
In the first day ye shall have an holy convocation: ye shall do no servile work therein.
But ye shall offer an offering made by fire unto the Lord seven days: in the seventh day is an holy convocation: ye shall do no servile work therein.
Counter-Arguments
The strongest case that this verse does not belong in this theme.

Related Verses
“And in the fifteenth day of this month is the feast: seven days shall unleavened bread be eaten.”
“Seven days thou shalt eat unleavened bread, and in the seventh day shall be a feast to the Lord.”
“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:)”
“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.”
“Unleavened bread shall be eaten seven days; and there shall no leavened bread be seen with thee, neither shall there be leaven seen with thee in all thy quarters.”