New Revised Standard Version
Whoever in the open field touches one who has been killed by a sword, or who has died naturally, or a human bone, or a grave, shall be unclean seven days.

Contemporary English Version
If you touch the body of someone who died or was killed, or if you touch a human bone or a grave, you will be unclean for seven days.

New American Bible
Moreover, everyone who in the open country touches a person who has been slain by the sword or who has died naturally, or who touches a human bone or a grave, will be unclean for seven days.

Douay-Rheims Bible
If any man in the field touch the corpse of a man that was slain, or that died of himself, or his bone, or his grave, he shall be unclean seven days.

If any man in the field touch the corpse of a man that was slain, or that died of himself, or his bone, or his grave, he shall be unclean seven days.

toucheth

Numbers 19:11 He that toucheth the corpse of a man, and is therefore unclean seven days,

Numbers 31:19 And stay without the camp seven days. He that hath killed a man, or touched one that is killed, shall be purified the third day and the seventh day.

a bone

Ezekiel 39:11-16 And it shall come to pass in that day, that I will give Gog a noted place for a sepulchre in Israel: the valley of the passengers on the east of the sea, which shall cause astonishment in them that pass by: and there shall they bury Gog, and all his multitude, and it shall be called the valley of the multitude of Gog. . . .

a grave

Matthew 23:27 Woe to you, scribes and Pharisees, hypocrites; because you are like to whited sepulchres, which outwardly appear to men beautiful but within are full of dead men's bones and of all filthiness.

Luke 11:44 Woe to you, because you are as sepulchres that appear not: and men that walk over are not aware.