This Bible contradiction is from the Skeptic's Annotated Bible.

Verses

Jesus sent the Holy Ghost.

John 15:26 View context

But when the Comforter is come, whom I will send unto you from the Father, [even] the Spirit of truth, which proceedeth from the Father, he shall testify of me:

The Father sent the Holy Ghost.

John 14:26 View context

But the Comforter, [which is] the Holy Ghost, whom the Father will send in my name, he shall teach you all things, and bring all things to your remembrance, whatsoever I have said unto you.