Numbers 19:16

19:16 And whoever touches the body of someone killed with a sword in the open fields, or the body of someone who died of natural causes, or a human bone, or a grave, will be unclean seven days.

Isaiah 65:4

65:4 They sit among the tombs

and keep watch all night long.

They eat pork,

and broth from unclean sacrificial meat is in their pans.