Numbers 6:6-8

Young's Literal Translation

⁶ `All days of his keeping separate to Jehovah, near a dead person he doth not go;

⁷ for his father, or for his mother, for his brother, or for his sister -- he is not unclean for them at their death, for the separation of his God [is] on his head;

⁸ all days of his separation he [is] holy to Jehovah.