Reference

Leviticus 22:30

On the same day it shall be eaten up; ye shall leave none of it until the morrow: I am the Lord.
28

And whether it be cow or ewe, ye shall not kill it and her young both in one day.

29

And when ye will offer a sacrifice of thanksgiving unto the Lord, offer it at your own will.

30

On the same day it shall be eaten up; ye shall leave none of it until the morrow: I am the Lord.

31

Therefore shall ye keep my commandments, and do them: I am the Lord.

32

Neither shall ye profane my holy name; but I will be hallowed among the children of Israel: I am the Lord which hallow you,

Counter-Arguments

The strongest case that this verse does not belong in this theme.

Seventh-Day Sabbath

The verse explicitly refers to "the same day" and "the morrow" in the context of eating something, not to the seventh day of the week or a Sabbath. There is no mention of a Sabbath or a rest day in the text.