Mark 11:33

33 And they answering say to Jesus, We do not know. And Jesus [answering] says to them, Neither do *I* tell you by what authority I do these things.

Mark 11:33 Meaning and Commentary

Mark 11:33

And they answered and said unto Jesus
Being reduced by this dilemma to the greatest streight and difficulty;

we cannot tell:
they could, if they would, but they did not care to tell; they knew if they did, they should expose themselves one way or other:

and Jesus answering, saith unto them, neither do I tell you by what
authority I do these things; (See Gill on Matthew 21:27).

Mark 11:33 In-Context

31 And they reasoned with themselves, saying, If we should say, Of heaven, he will say, Why [then] have ye not believed him?

32 but should we say, Of men -- they feared the people; for all held of John that he was truly a prophet.

33 And they answering say to Jesus, We do not know. And Jesus [answering] says to them, Neither do *I* tell you by what authority I do these things.