They in 1 John
3 verses in 1 John.
1 John 2:19They 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.
1 John 4:1Beloved, believe not every spirit, but try the spirits whether they are of God: because many false prophets are gone out into the world.
1 John 4:5They are of the world: therefore speak they of the world, and the world heareth them.