1 John 2:2

And he it is that obtaineth grace for our sins; and not for our sins only, but also for the sins of all the world.

1 John 4:10

Herein is love, not that we loved God, but that he loved us, and sent his son to make a satisfaction for our sins.

John 4:42

and said unto the woman, "Now we believe not because of thy saying: for we have heard him ourselves, and know that this is even indeed Christ, the saviour of the world."

1 John 4:14

And we have seen and do testify that the father hath sent his son, which is the saviour of the world.

John 1:29

The next day, John saw Jesus coming unto him, and said, "Behold, the lamb of God, which taketh away the sin of the world.

John 11:51-52

This spake he not of himself: but being high priest that same year, prophesied he that Jesus should die for the people,

John 12:32

And I, if I were lifted up from the earth, will draw all men unto me."

Romans 3:25-26

- whom God hath set forth for a mercy seat through faith in his blood, to show the righteousness which before him is of valour, in that he forgiveth the sins that are passed,

2 Corinthians 5:18-21

Nevertheless, all things are of God, which hath reconciled us unto himself by Jesus Christ, and hath given unto us the office to preach the atonement.

1 Peter 2:24

which his own self bare our sins in his body on the tree, that we should be delivered from sin and should live in righteousness. By whose stripes ye were healed.

1 Peter 3:18

Forasmuch as Christ hath once suffered for sins, the just for the unjust, for to bring us to God, and was killed, as pertaining to the flesh: but was quickened in the spirit.

1 John 1:7

but and if we walk in light even as he is in light, then have we fellowship together, and the blood of Jesus Christ his son cleanseth us from all sin.

1 John 5:19

We know that we be of God, and that the world is altogether set on mischief.

Revelation 12:9

And the great dragon, that old serpent called the devil and Satan; Was cast out. Which deceiveth all the world. And he was cast into the earth, and his angels were cast out also.

Treasury of Scripture Knowledge

Summary

And he is the propitiation for our sins: and not for ours only, but also for the sins of the whole world.

Bible References

He is

1 John 1:7
but and if we walk in light even as he is in light, then have we fellowship together, and the blood of Jesus Christ his son cleanseth us from all sin.
1 John 4:10
Herein is love, not that we loved God, but that he loved us, and sent his son to make a satisfaction for our sins.
Romans 3:25
- whom God hath set forth for a mercy seat through faith in his blood, to show the righteousness which before him is of valour, in that he forgiveth the sins that are passed,
1 Peter 2:24
which his own self bare our sins in his body on the tree, that we should be delivered from sin and should live in righteousness. By whose stripes ye were healed.
1 Peter 3:18
Forasmuch as Christ hath once suffered for sins, the just for the unjust, for to bring us to God, and was killed, as pertaining to the flesh: but was quickened in the spirit.

For the

1 John 4:14
And we have seen and do testify that the father hath sent his son, which is the saviour of the world.
1 John 5:19
We know that we be of God, and that the world is altogether set on mischief.
John 1:29
The next day, John saw Jesus coming unto him, and said, "Behold, the lamb of God, which taketh away the sin of the world.
John 4:42
and said unto the woman, "Now we believe not because of thy saying: for we have heard him ourselves, and know that this is even indeed Christ, the saviour of the world."
John 11:51
This spake he not of himself: but being high priest that same year, prophesied he that Jesus should die for the people,
2 Corinthians 5:18
Nevertheless, all things are of God, which hath reconciled us unto himself by Jesus Christ, and hath given unto us the office to preach the atonement.
Revelation 12:9
And the great dragon, that old serpent called the devil and Satan; Was cast out. Which deceiveth all the world. And he was cast into the earth, and his angels were cast out also.

General references

Exodus 37:6
And he made the mercy seat of pure gold two cubits and a half long and one cubit and a half broad,
Exodus 40:6
And set the burnt offering altar before the door of the tabernacle of witness,
Leviticus 14:29
And the rest of the oil that is in his hand, he shall pour upon the head of him that is cleansed: to make an atonement for him before the LORD.
Leviticus 23:28
Moreover ye shall do no work the same day, for it is a day of atonement to make an atonement for you before the LORD your God.
Ezekiel 33:16
Yea the sins that he hath done, shall never be thought upon: For insomuch as he doth now the thing that is lawful and right, he shall live.
Hebrews 8:12
For I will be merciful over their unrighteousness, and on their sins and on their iniquities."