1 John 2:19; 1 John 4:5; 1 John 5:3; 1 John 5:7-8 (King James Version)

19 They went out from us, but they were not of us; for if they had been of us, they would no doubt have continued with us: but they went out, that they might be made manifest that they were not all of us. 5 They are of the world: therefore speak they of the world, and the world heareth them. 3 For this is the love of God, that we keep his commandments: and his commandments are not grievous. 7 For there are three that bear record in heaven, the Father, the Word, and the Holy Ghost: and these three are one. 8 And there are three that bear witness in earth, the Spirit, and the water, and the blood: and these three agree in one.