27 And they came again to Jerusalem. And as he was walking in the temple, the chief priests and the scribes and the elders came to him, 28 and they said to him, "By what authority are you doing these things, or who gave you this authority to do them?" 29 Jesus said to them, "I will ask you one question; answer me, and I will tell you by what authority I do these things. 30 Was the baptism of John from heaven or from man? Answer me." 31 And they discussed it with one another, saying, "If we say, 'From heaven,' he will say, 'Why then did you not believe him?' 32 But shall we say, 'From man'?"-- they were afraid of the people, for they all held that John really was a prophet. 33 So they answered Jesus, "We do not know." And Jesus said to them, "Neither will I tell you by what authority I do these things."
Matthew Henry's Commentary on Mark 11:27-33
Commentary on Mark 11:27-33
(Read Mark 11:27-33)
Our Saviour shows how near akin his doctrine and baptism were to those of John; they had the same design and tendency, to bring in the gospel kingdom. These elders did not deserve to be taught; for it was plain that they contended not for truth, but victory: nor did he need to tell them; for the works he did, told them plainly he had authority from God; since no man could do the miracles which he did, unless God were with him.