Mark 8:11-13 - Pharisees Demand A Sign
11 And the Pharisees came out and put questions to him, requesting from him a sign from heaven, testing him. 12 And he was very sad in spirit, and said, Why is this generation looking for a sign? truly, I say to you, No sign will be given to this generation. 13 And he went away from them, and again got into the boat and went across to the other side.