Albert Barnes on John 19:10

Speakest thou not, &c. This is the expression of a man of pride. He was not accustomed to be met with silence like this. He endeavoured, therefore, to address the fears of Jesus, and to appall him with the declaration that his life was at his disposal, and that his safety depended on his favour. This arrogance called forth the reply of the Saviour, and he told him that he had no power except what was given him from above. Jesus was not, therefore, to be intimidated by any claim of power in Pilate. His life was not in his hands, and he could not stoop to ask the favour of a man.

(g) "I have power to crucify" Dan 3:14,15