Atonement

Heb 10:1-4
For the law, having a shadow of the good things to come, and not the very image of the things, can never with these same sacrifices, which they offer continually year by year, make those who approach perfect. 2 For then would they not have ceased to be offered? For the worshipers, once purified, would have had no more consciousness of sins. 3 But in those sacrifices there is a reminder of sins every year. 4 For it is not possible that the blood of bulls and goats could take away sins.
NKJV

Ex 29:32-33
Then Aaron and his sons shall eat the flesh of the ram, and the bread that is in the basket, by the door of the tabernacle of meeting. 33 They shall eat those things with which the atonement was made, to consecrate and to sanctify them; but an outsider shall not eat them, because they are holy.
NKJV

John 6:53-56
Then Jesus said to them, "Most assuredly, I say to you, unless you eat the flesh of the Son of Man and drink His blood, you have no life in you. 54 Whoever eats My flesh and drinks My blood has eternal life, and I will raise him up at the last day. 55 For My flesh is food indeed, and My blood is drink indeed. 56 He who eats My flesh and drinks My blood abides in Me, and I in him.
NKJV

Ps 65:3
Iniquities prevail against me;
As for our transgressions,
You will provide atonement for them.
NKJV

Heb 9:22
In fact, the law requires that nearly everything be cleansed with blood, and without the shedding of blood there is no forgiveness.
(NIV)

Heb 10:10
And by that will, we have been made holy through the sacrifice of the body of Jesus Christ once for all.
NIV

Rev 1:5-6
. . .and from Jesus Christ, the faithful witness, the firstborn from the dead, and the ruler over the kings of the earth. To Him who loved us and washed us from our sins in His own blood, 6 and has made us kings and priests to His God and Father, to Him be glory and dominion forever and ever. Amen.
NKJV

Rev 7:14-17
"These are the ones who come out of the great tribulation, and washed their robes and made them white in the blood of the Lamb. 15 Therefore they are before the throne of God, and serve Him day and night in His temple. And He who sits on the throne will dwell among them. 16 They shall neither hunger anymore nor thirst anymore; the sun shall not strike them, nor any heat; 17 for the Lamb who is in the midst of the throne will shepherd them and lead them to living fountains of waters. And God will wipe away every tear from their eyes."
NKJV

Atonement;
Hebrew: kaphar (kaw-far'); a primitive root; to cover (specifically with bitumen); figuratively, to expiate or condone, to placate or cancel: