The nearest of kin in natural ties is not so near as spiritual. There is a friend that sticketh closer than a brother. Proverbs 18:24.
Related Commentaries of Leviticus 21:2
Leviticus 21:2-3
2 But for his kin, that is near unto him, that is, for his mother, and for his father, and for his son, and for his daughter, and for his brother,
3 And for his sister a virgin, that is nigh unto him, which hath had no husband; for her may he be defiled.