Mark 8:11 in the World English Bible
The Pharisees came out and began to question him, seeking from him a sign from heaven and testing him.
Context
10 And straightway he entered into a ship with his disciples, and came into the parts of Dalmanutha.
11 And the Pharisees came forth, and began to question with him, seeking of him a sign from heaven, tempting him.
12 And he sighed deeply in his spirit, and saith, Why doth this generation seek after a sign? verily I say unto you, There shall no sign be given unto this generation.