Reference

John 6:36

But I said unto you, That ye also have seen me, and believe not.
34

Then said they unto him, Lord, evermore give us this bread.

35

And Jesus said unto them, I am the bread of life: he that cometh to me shall never hunger; and he that believeth on me shall never thirst.

36

But I said unto you, That ye also have seen me, and believe not.

37

All that the Father giveth me shall come to me; and him that cometh to me I will in no wise cast out.

38

For I came down from heaven, not to do mine own will, but the will of him that sent me.

Counter-Arguments

The strongest case that this verse does not belong in this theme.

Single Unified Return

This verse speaks about people having seen Jesus and not believing, which is a statement about their current spiritual state or past interaction, not about future eschatological events like resurrection, judgment, or gathering. There is no mention of a "return" of any kind, unified or otherwise.