“so Christ was offered once, to void the sins of many men [for to void, or do away, the sins of many men]; the second time he shall appear without sin to men that abide him into health.”
Bishops (priests) acting in the old covenant (testament) offer the blood of bulls, goats, lambs repeatedly, year and year in order to cleanse themselves and the peoples of sins. In the new covenant (testament) Jesus as the only Bishop (Priest) offers Himself once, not to cleanse but to void (to do away with) the sins of many.
Christ plans to return “without sin” to His people who “abide Him into health.” What does that mean? “Without sin?” Jesus becomes sin on the cross; when He appears a second time, He no longer carries the sins of the world for He voids these on the cross by His own blood.
Christ’s sacrifice is not repeatable. Nothing need be added to it; and certainly nothing may be taken from it!