Mark 8:11-13 - Pharisees Demand A Sign
11 And the Pharisees came forth, and began to dispute with him, seeking of him a sign from heaven and tempting him, 12 and he sighed in his spirit and said, "Why doth this generation seek a sign? Verily I say unto you, there shall no sign be given unto this generation." 13 And he left them and went into the ship again, and departed over the water.