Mark 5:30

And immediately Jesus, perceiving in Himself the power that had gone out from Him, turned to the crowd and said: "Who touched My garments?" He asked not to learn what He did not know, but that the power He clearly knew, indeed which He Himself had given, might be declared in the woman, and by the declared and recognized power of faith, many might reach salvation.

(Vict. Ant. e Cat. in Marc.) Now the virtues of Christ are by His own will imparted to those men, who touch Him by faith. Wherefore there follows, And Jesus, immediately knowing in himself that virtue had gone out of him, turned him about in the press, and said, Who touched my clothes? The virtues indeed of the Saviour do not go out of Him locally or corporally, nor in any respect pass away from Him. For being incorporeal, they go forth to others and are given to others; they are not however separated from Him, from whom they are said to go forth, in the same way as sciences are given by the teacher to his pupils. Therefore it says, Jesus, knowing in himself the virtue which had gone out of him, to show that with His knowledge, and not without His being aware of it, the woman was healed. But He asked, Who touched me? although He knew her who touched Him, that He might bring to light the woman, by her coming forward, and proclaim her faith, and lest the virtue of His miraculons work should be consigned to oblivion. It goes on, And his disciples said unto him, Thou seest the multitude thronging thee, and sayest thou, Who touched me? But the Lord asked, Who touched me, that is in thought and faith, for the crowds who throng Me cannot be said to touch Me, for they do not come near to Me in thought and in faith. There follows, And he looked round about to see her that had done this thing.