Luke 7:1-10:

"When Jesus had finished saying all this to the people, he returned to Capernaum.  At that time the highly valued slave of a Roman officer was sick and near death.  When the officer heard about Jesus, he sent some respected Jewish elders to ask him to come and heal his slave.  So they earnestly begged Jesus to help the man.  "If anyone deserves your help, he does," they said, "for he loves the Jewish people and even built a synagogue for us." 
So Jesus went with them.  But just before they arrived at the house, the officer sent some friends to say, "Lord, don't trouble yourself by coming to my home, for I am not worthy of such an honor.  I am not even worthy to come and meet you.  Just say the word from where you are, and my servant will be healed.  I know this because I am under the authority of my superior officers, and I have authority over my soldiers.  I only need to say, 'Go,' and they go, or 'Come,' and they come.  And if I say to my slaves, 'Do this,' they do it."
When Jesus heard this, he was amazed.  Turning to the crowd that was following him, he said, "I tell you, I haven't seen faith like this in all Israel!" And when the officer's friends returned to his house, they found the slave completely healed."