Leviticus 21:1-3

New International Version - UK

Rules for priests

21 The Lord said to Moses, ‘Speak to the priests, the sons of Aaron, and say to them: “A priest must not make himself ceremonially unclean for any of his people who die, ² except for a close relative, such as his mother or father, his son or daughter, his brother, ³ or an unmarried sister who is dependent on him since she has no husband – for her he may make himself unclean.