Haggai 2:13 References

13 Then Haggai said, "aIf one who is unclean from a corpse touches any of these, will the latter become unclean?" And the priests answered, "It will become unclean."

a Leviticus 22:4-6, Numbers 19:22

Leviticus 22

4 'aNo man of the descendants of Aaron, who is a leper or who has a discharge, may eat of the holy gifts until he is clean. bAnd if one touches anything made unclean by a corpse or if ca man has a seminal emission,
5 or aif a man touches any teeming things by which he is made unclean, or any man by whom he is made unclean, whatever his uncleanness;
6 a person who touches any such shall be unclean until evening, and shall not eat of the holy gifts unless he has bathed his body in water.

Numbers 19

22 'aFurthermore, anything that the unclean person touches shall be unclean; and the person who touches it shall be unclean until evening.'"