Mark 8:11-13 - Pharisees Demand A Sign
11 Then the Pharisees came out, and began to question him, seeking of him a sign from heaven, tempting him. 12 And fetching a deep sigh from his very soul, he saith, Why seeketh this generation a sign? verily I tell you, no sign shall be given to this generation. 13 And leaving them, going again on board the vessel, he departed to the other side.