NET

17 Therefore he had to be made like his brothers and sisters in every respect, so that he could become a merciful and faithful high priest in things relating to God, to make atonement for the sins of the people.

Darby

17 Wherefore it behoved him in all things to be made like to [his] brethren, that he might be a merciful and faithful high priest in things relating to God, to make propitiation for the sins of the people;

KJV

17 Wherefore in all things it behoved him to be made like unto [his] brethren, that he might be a merciful and faithful high priest in things [pertaining] to God, to make reconciliation for the sins of the people.