Mark 8:11-13
The Demand for a Sign
8:11 Then the Pharisees came and began to argue with Jesus, asking for a sign from heaven to test him.
8:12 Sighing deeply in his spirit he said, “Why does this generation look for a sign? I tell you the truth, no sign will be given to this generation.”
8:13 Then he left them, got back into the boat, and went to the other side.