Mark 8:11-13 - Pharisees Demand A Sign
11 And the Pharisees came out and began to question him, seeking from him a sign from heaven, by way of testing him. 12 At this Jesus sighed deeply in his spirit, and said: "Why does the present generation seek a sign? In solemn truth I tell you that no sign shall be given this generation." 13 Then he left them, and getting into the boat again, went away to the other side,