Numbers 19:16

Whoever is outdoors and touches someone who was killed or has died naturally or anyone who touches a human bone or a grave will be unclean for seven days.

Numbers 31:19

Everyone who killed a person or touched a dead body must stay outside the camp seven days. You and your prisoners of war must use the ritual water on the third and seventh days in order to take away your sin.

Matthew 23:27

Woe to you, scribes and Pharisees, hypocrites! You are like whitewashed tombs that appear beautiful on the outside. They are full of dead men's bones and uncleanness on the inside.

Numbers 19:11

Those who touch a corpse are ritually unclean for seven days.

Luke 11:44

Woe to you! You are as the tombs that do not appear and men walk over them and do not know it.

Ezekiel 39:11-16

On that day I will give Gog a burial ground there in Israel, the valley of those who pass by east of the sea. It will block off those who would pass by. So they will bury Gog there with his entire horde, and they will call it the valley of Hamon-gog (Multitude of God).

Treasury of Scripture Knowledge

Summary

And whosoever toucheth one that is slain with a sword in the open fields, or a dead body, or a bone of a man, or a grave, shall be unclean seven days.

A bone

General references

Bible References

Toucheth

Numbers 19:11
Those who touch a corpse are ritually unclean for seven days.
Numbers 31:19
Everyone who killed a person or touched a dead body must stay outside the camp seven days. You and your prisoners of war must use the ritual water on the third and seventh days in order to take away your sin.

A bone

Ezekiel 39:11
On that day I will give Gog a burial ground there in Israel, the valley of those who pass by east of the sea. It will block off those who would pass by. So they will bury Gog there with his entire horde, and they will call it the valley of Hamon-gog (Multitude of God).

A grave

Matthew 23:27
Woe to you, scribes and Pharisees, hypocrites! You are like whitewashed tombs that appear beautiful on the outside. They are full of dead men's bones and uncleanness on the inside.
Luke 11:44
Woe to you! You are as the tombs that do not appear and men walk over them and do not know it.

General references

Leviticus 7:19
The flesh that touches anything unclean shall not be eaten. It should be burned with fire. As for other flesh, anyone who is clean may eat such flesh.
Leviticus 11:39
When any animal that you are allowed to eat dies, whoever touches its dead body will be unclean until evening.