13 Then Haggai said, If one that is unclean by a dead body touches any of these, shall it be unclean? And the priests answered and said, It shall be unclean.
Haggai 2:13 Cross References - EJ2000
Leviticus 22:4-6
4 Whatever man of the seed of Aaron who is a leper or has a running issue shall not eat of the holy things until he is clean. And whosoever touches any thing that is unclean by the dead or a man whose seed has gone out from him
5 or the man who has touched any reptile, by which he shall be unclean, or a man of whom he shall become unclean, according to whatever uncleanness he has,
6 the person who has touched any such shall be unclean until evening and shall not eat of the holy things until he has washed his flesh with water.
Numbers 5:2-3
Numbers 9:6-10
6 And there were certain men, who were defiled by the dead body of a man, that they could not keep the passover on that day; and they came before Moses and before Aaron on that day;
7 and those men said unto him, We are defiled by the dead body of a man; why are we kept back, that we may not offer an offering of the LORD in his appointed season among the sons of Israel?
8 And Moses said unto them, Wait, and I will hear what the LORD will command concerning you.
9 And the LORD spoke unto Moses, saying,
10 Speak unto the sons of Israel, saying, If any man of you or of your generations should be unclean by reason of a dead body or be on a journey afar off, yet he shall keep the passover unto the LORD.
Numbers 19:11-22
11 ¶ He that touches the dead body of any human person shall be unclean seven days.
12 They shall remove the sin from themselves with that water on the third day, and on the seventh day they shall be clean; but if they do not remove the sin from themselves the third day, then the seventh day they shall not be clean.
13 Whoever touches the dead body of anyone that is dead and does not remove the sin has defiled the tabernacle of the LORD; and that person shall be cut off from Israel; because the water of separation was not sprinkled upon him, he shall be unclean, and his uncleanness shall be upon him.
14 This is the law when anyone dies in a tent; all that come into the tent and all that are in the tent shall be unclean seven days.
15 And every open vessel which has no lid fastened upon it shall be unclean.
16 And whoever touches one that is slain with a sword in the open fields or a dead body or a human bone or a grave, shall be unclean seven days.
17 And for the unclean person they shall take of the dust of the heifer that was burnt as sin and put living water over it in a vessel;
18 and a clean person shall take hyssop and dip it in the water and sprinkle it upon the tent and upon all the stuff and upon the persons that were there and upon the one that touched the bone or the one slain or the one dead or the grave.
19 And the clean person shall sprinkle upon the unclean on the third day and on the seventh day; and when he has removed the sin from them the seventh day, he shall then wash his clothes and bathe himself in water and shall be clean in the evening.
20 But the man that shall be unclean and shall not cause the sin to be removed from himself, that person shall be cut off from among the congregation because he has defiled the tabernacle of the LORD; the water of separation has not been sprinkled upon him; he is unclean.
21 And it shall be a perpetual statute unto them, also he that sprinkles the water of separation shall wash his clothes; and he that touches the water of separation shall be unclean until evening.
22 And whatever the unclean person touches shall be unclean; and the person that touches it shall be unclean until evening.