Romans 5:10-11
For if, when we were God's enemies, we were reconciled to him through the death of his Son, much more, now that we have become reconciled, shall we be saved by virtue of Christ's Life.
Hebrews 9:12
Nor was it with the blood of goats and calves, but with his own blood, that he entered, once and for all, into the Sanctuary, and obtained our eternal deliverance.
Hebrews 9:26
for then Christ would have had to undergo death many times since the creation of the world. But now, once and for all, at the close of the age, he has appeared, in order to abolish sin by the sacrifice of himself.
Hebrews 10:10
And it is in the fulfillment of the will of God that we have been purified by the sacrifice, once and for all, of the body of Jesus Christ.
Hebrews 10:14
By a single offering he has made perfect for all time those who are being purified.
1 John 2:2
and he is the atoning sacrifice for our sins, and not for ours only, but for those of the whole world besides.
1 John 4:10
His love is seen in this--not in our having loved God, but in his loving us and sending his Son to be an atoning sacrifice for our sins.
1 John 5:6
He it is whose Coming was attested by means of Water and Blood--Jesus Christ himself; not by Water only, but by Water and by Blood. And there is the Spirit also to bear testimony, and the Spirit is Truth itself.