6 Bible Verses about Atonement, Made Once

one who has no need, like the high priests, to offer up daily sacrifices, first for his own sins, then for those of the people. For his sacrifice was made once for all, when he offered up himself.

For it was not into a Sanctuary made by hands, a mere type of the reality, that Christ entered, but he entered into heaven itself, now to appear in the very presence of God on our behalf. Nor did he enter to offer himself repeatedly, as the high priest entered into the sanctuary, year after year, with blood that was not his own; (for in that case he would have needed to suffer repeatedly, ever since the foundation of the world;)but now, once for all, at the end of the ages, he has appeared to abolish sin, but the offering of himself.read more.
And since it is appointed to men once to die, and after that the judgment; so also the Christ, after being once for all offered to bear the sins of many, will appear a second time, without sin, to those who wait for him for salvation.

And it is by this will that we have been sanctified by the offering of the body of Jesus Christ once for all.

this Priest, after offering one Sacrifice for sins, sat down forever on God's right hand;

For by one single offering he has perfected forever those whom he is sanctifying.

because Christ also once for all suffered for sins, the just for the unjust, that he might bring us to God. He was put to death in the flesh, but make alive in spirit.