16 “Whoever in the open field touches one who is slain with a sword, or a dead body, or a bone of a man, or a grave, shall be unclean seven days.
Numbers 19:16 Cross References - WEB
Numbers 19:11
11 “He who touches the dead body of any man shall be unclean seven days.
Numbers 31:19
19 “Encamp outside of the camp for seven days. Whoever has killed any person, and whoever has touched any slain, purify yourselves on the third day and on the seventh day, you and your captives.
Ezekiel 39:11-16
11 “‘“It will happen in that day, that I will give to Gog a place for burial in Israel, the valley of those who pass through on the east of the sea; and it will stop those who pass through. They will bury Gog and all his multitude there; and they will call it ‘The valley of Hamon Gog’.
12 “‘“The house of Israel will be burying them for seven months, that they may cleanse the land.
13 Yes, all the people of the land will bury them; and they will become famous in the day that I will be glorified,” says the Lord Yahweh.
14 “‘“They will set apart men of continual employment, who will pass through the land. Those who pass through will go with those who bury those who remain on the surface of the land, to cleanse it. After the end of seven months they will search.
15 Those who pass through the land will pass through; and when anyone sees a man’s bone, then he will set up a sign by it, until the undertakers have buried it in the valley of Hamon Gog.
16 Hamonah will also be the name of a city. Thus they will cleanse the land.”’
Matthew 23:27
27 “Woe to you, scribes and Pharisees, hypocrites! For you are like whitened tombs, which outwardly appear beautiful, but inwardly are full of dead men’s bones, and of all uncleanness.
Luke 11:44
44 Woe to you, scribes and Pharisees, hypocrites! For you are like hidden graves, and the men who walk over them don’t know it.”