Luke 22:50-51:

And one of them smote the servant of the high priest, and cut off his right ear.
And Jesus answered and said, Suffer ye thus far.  And he touched his ear, and healed him.

Notes on Luke 22:50-51:

Want to see how willing Jesus is to heal?  Check out this passage.  Jesus was willing to perform a miracle for one of His enemies – a man who had come to take Him away to be killed!  If He was willing to extend such mercy to His enemies, think how much mercy He must be willing to extend to one of His friends!  (Jesus calls you His friend if you obey Him – John 15:14.)

See also:

Must We Lay Hands on the Specific Afflicted Body Part?
Can I Get Healed of Injuries from Accidents as Well as Diseases?
Condition: Injuries
Condition: Severing