6 Bible Verses about Atonement, Made Once

Who hath no necessity daily, as the high priests, to offer up sacrifices, first for his own sins, and then for those of the people (for this He did once for all, when He offered up Himself);

For Christ entered not into holy places made with hand, patterns of the true; but into Heaven itself, now to appear in the presence of God in our behalf; nor yet, that He should many times offer Himself, as the high priest enters into the Holies every year with blood not His own; else had it been needful for Him ofttimes to suffer since the founding of a world; but now, once for all, at the end of the ages, He hath been manifested for the putting away of sin through the sacrifice of Himself.read more.
And inasmuch as it is appointed to men once to die, but after this comes judgment; so also Christ, having once for all been offered to bear the sins of many, will, to those who are eagerly waiting for Him; appear a second time apart from sin, unto salvation.

in which will we have been sanctified through the offering of the body of Jesus Christ once for all.

but This Man, having offered one sacrifice for sins forever, sat down on the right hand of God;

For by one offering He hath perfected forever those who are being sanctified.

because Christ also suffered for sins once, a Righteous One in behalf of the unrighteous, that He might bring us to God, being put to death in flesh, but made alive in the Spirit,