John 17:21 in the King James Version
That they all may be one; as thou, Father, art in me, and I in thee, that they also may be one in us: that the world may believe that thou hast sent me.
Context
20 “Not for these only do I pray, but for those also who will believe in me through their word,
21 that they may all be one; even as you, Father, are in me, and I in you, that they also may be one in us; that the world may believe that you sent me.
22 The glory which you have given me, I have given to them, that they may be one, even as we are one,