Mark 10:31
"But many that are first shall be last; and the last first."
Cross References (ranked by relevance)
Matthew 19:30
But many that are first shall be last; and the last shall be first.
Luke 13:30
And, behold, there are last which shall be first, and there are first which shall be last.
Matthew 20:16
So the last shall be first, and the first last: for many be called, but few chosen.
Matthew 21:31
Whether of them twain did the will of his father? They say unto him, The first. Jesus saith unto them, Verily I say unto you, That the publicans and the harlots go into the kingdom of God before you.