Numbers 6:7
For his father, and for his mother, for his brother and for his sister, he shall not be defiled for them in their dying: for the consecration of his God upon his head.
Numbers 9:6
And there shall be men who were unclean by the soul of man, and they will not be able to do the passover in that day: and they came near before Moses and before Aaron, in that day:
Leviticus 21:1-2
And Jehovah will say to Moses, Say to the priests the sons of Aaron, and say to them, for the soul he shall not be defiled among his peoples.
Leviticus 21:10-12
And the great priest from his brethren which the anointing oil shall be poured upon his head, and he filled his hand to put on the garments, his head he shall not uncover, and his garments he shall not rend.
Ezekiel 44:25
And to a dead man they shall not come to be defiled: but for father and for mother, and for son and for daughter, for brother, for sister who was not to a husband, they shall be defiled.