Mark 11:29

Overview - Mark 11
1	Christ rides with triumph into Jerusalem;
12	curses the fruitless fig-tree;
15	purges the temple;
20	exhorts his disciples to stedfastness of faith, and to forgive their enemies;
27	and defends the lawfulness of his actions by the witness of John, who was a man sent of God.

Mark 11:29  (King James Version)
And Jesus answered and said unto them, I will also ask of you one question, and answer me, and I will tell you by what authority I do these things.