John Gill Commentary Mark 5:31

"And his disciples said unto him, Thou seest the multitude thronging thee, and sayest thou, Who touched me?" — Mark 5:31 (ASV)

And his disciples said to him
Peter, and they who were with him; after the crowd who were about him denied that any of them had touched him; see (Luke 8:45) ,

you see the multitude thronging you, and do you say who touched
me ?
They seem astonished at his question, and answer with some degree of warmth, and almost ready to charge it as weak: and impertinent;

since, as there was such a crowd about him, pressing him on every side, he could not but be touched by many; and therefore to ask who touched him, when this was the case, they thought was a very strange and unnecessary question.