John Gill Commentary Mark 11:28

"and they said unto him, By what authority doest thou these things? or who gave thee this authority to do these things?" — Mark 11:28 (ASV)

And say unto him, by what authority do you do these
things ?
&c.] Enter into the temple, as if he was Lord of it; and correct in such a magisterial way every thing he thought an abuse in it; do the miracles he did, as healing the lame, and blind; and take upon him to instruct the people, a work he was now engaged in:

and who gave you this authority to do these things ?
(See Gill on Matthew 21:23).