Matthew 26:50

"And Jesus said unto him, Friend, wherefore art thou come? Then came they, and laid hands on Jesus, and took him."

Cross References (ranked by relevance)

But he answered one of them, and said, Friend, I do thee no wrong: didst not thou agree with me for a penny?

And he saith unto him, Friend, how camest thou in hither not having a wedding garment? And he was speechless.

Yea, mine own familiar friend, in whom I trusted, which did eat of my bread, hath lifted up his heel against me.

And Absalom said to Hushai, Is this thy kindness to thy friend? why wentest thou not with thy friend?

But Jesus said unto him, Judas, betrayest thou the Son of man with a kiss?