Numbers 6:7
He must not defile himself even for his father or his mother or his brother or his sister if they die, because the separation for his God is on his head.
Numbers 9:6
It happened that some men who were ceremonially defiled by the dead body of a man could not keep the Passover on that day, so they came before Moses and before Aaron on that day.
Leviticus 21:1-2
The Lord said to Moses: "Say to the priests, the sons of Aaron -- say to them, 'For a dead person no priest is to defile himself among his people,
Leviticus 21:10-12
"'The high priest -- who is greater than his brothers, on whose head the anointing oil is poured, who has been ordained to wear the priestly garments -- must neither dishevel the hair of his head nor tear his garments.
Ezekiel 44:25
"'They must not come near a dead person or they will be defiled; however, for father, mother, son, daughter, brother or sister, they may defile themselves.