Great question! I think that is not the only instance. There have been other instances where Jesus healed without the person requested.. Another passage for deeper study
John 5
1 Afterward Jesus returned to Jerusalem for one of the Jewish holy days.2 Inside the city, near the Sheep Gate, was the pool of Bethesda, with five covered porches. 3 Crowds of sick people—blind, lame, or paralyzed—lay on the porches. 5 One of the men lying there had been sick for thirty-eight years. 6 When Jesus saw him and knew he had been ill for a long time, he asked him, “Would you like to get well?” 7 “I can’t, sir,” the sick man said, “for I have no one to put me into the pool when the water bubbles up. Someone else always gets there ahead of me.” 8 Jesus told him, “Stand up, pick up your mat, and walk!” 9 Instantly, the man was healed!
Interestingly, the pool has "crowds of sick people". We are not talking about a few.. Crowds.. Jesus is actually reaching out to a person. The person did not reach out to Jesus or asked for healing..
Faith is an instrument Jesus uses for healing.. However, it is important to remember that Jesus is not forced to give healing when a person is in faith.. Everything MUST happen in accordance with his will.. Not ours..