The Pharisees came and required a sign from him from heaven.

The Pharisees came and required a sign from him from heaven. After Jesus had sighed deeply, he refused to give them any sign but that of Jonah. He called them hypocrites because knew how to tell the weather from the appearance of the sky but could not discern the times. He left them and sailed to the other side. (MRK 8:11-13 16:1-4)