1 John 2:18-19

BLB(i) 18 Little children, it is the last hour, and as you have heard that antichrist is coming, even now many antichrists have arisen, whereby we know that it is the last hour. 19 They went out from among us, but they were not of us; for if they had been of us, they would have remained with us. But it is so that it might be made manifest that they are not all of us.