Leviticus 21:1-3

¹And the Lord said to Moses, Speak thou to the priests, the sons of Aaron, and thou shalt say to them, A priest be not defouled in the dead men of his citizens,

²no but only in his kinsmen, and nigh of blood, that is, on father, and mother, and son, and daughter, and brother,

³and sister, a virgin, that is not wedded to man;