The revelation that The Overcomers are those who are believers in Jesus (given mostly through John the Apostle)

Rom.3

3:4 God forbid: yea, let God be true, but every man a liar; as it is written, That thou mightest be justified in thy sayings, and mightest overcome when thou art judged.

I Jn. 2

2:13 I write unto you, fathers, because ye have known him that is from the beginning. I write unto you, young men, because ye have overcome the wicked one. I write unto you, little children, because ye have known the Father.

2:14 I have written unto you, fathers, because ye have known him that is from the beginning. I have written unto you, young men, because ye are strong, and the word of God abideth in you, and ye have overcome the wicked one.

I Jn. 4

4:2 Hereby know ye the Spirit of God: Every spirit that confesseth that Jesus Christ is come in the flesh is of God:

4:3 And every spirit that confesseth not that Jesus Christ is come in the flesh is not of God: and this is that spirit of antichrist, whereof ye have heard that it should come; and even now already is it in the world.

4:4 Ye are of God, little children, and have overcome them: because greater is he that is in you, than he that is in the world.

I Jn. 5

5:4 For whatsoever is born of God overcometh the world: and this is the victory that overcometh the world, even our faith.

5:5 Who is he that overcometh the world, but he that believeth that Jesus is the Son of God?  (Jesus said “These things I have spoken unto you, that in me ye might have peace. In the world ye shall have tribulation: but be of good cheer; I have overcome the world.”  - This is how we overcome by faith, our faith in Jesus – He who has personally overcome the world.)

Rev.2

2:7 He that hath an ear, let him hear what the Spirit saith unto the churches; To him that overcometh will I give to eat of the tree of life, which is in the midst of the paradise of God.

2:11 He that hath an ear, let him hear what the Spirit saith unto the churches; He that overcometh shall not be hurt of the second death.

2:17 He that hath an ear, let him hear what the Spirit saith unto the churches; To him that overcometh will I give to eat of the hidden manna, and will give him a white stone, and in the stone a new name written, which no man knoweth saving he that receiveth it.

2:26 And he that overcometh, and keepeth my works unto the end, to him will I give power over the nations:

Rev.12

12:10 And I heard a loud voice saying in heaven, Now is come salvation, and strength, and the kingdom of our God, and the power of his Christ: for the accuser of our brethren is cast down, which accused them before our God day and night.

12:11 And they overcame him by the blood of the Lamb, and by the word of their testimony; and they loved not their lives unto the death.