Hebrews 9:12-14, 16, 26

Christ entered the Most Holy Place only once—and for all time. He did not take with him the blood of goats and calves. His sacrifice was his own blood, and by it he set us free from sin forever. The blood of goats and bulls and the ashes of a cow are sprinkled on the people who are unclean, and this makes their bodies clean again. How much more is done by the blood of Christ. He offered himself through the eternal Spirit as a perfect sacrifice to God. His blood will make our consciences pure from useless acts so we may serve the living God.

When there is a will, it must be proven that the one who wrote that will is dead.

Then he would have had to suffer many times since the world was made. But Christ came only once and for all time at just the right time to take away all sin by sacrificing himself.