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

Verses

Jesus told his disciples everything.

John 15:15 View context

Henceforth I call you not servants; for the servant knoweth not what his lord doeth: but I have called you friends; for all things that I have heard of my Father I have made known unto you.

There were some things that Jesus didn't tell them.

John 16:12 View context

I have yet many things to say unto you, but ye cannot bear them now.