Mark 8:11-13

Young's Literal Translation

¹¹ and the Pharisees came forth, and began to dispute with him, seeking from him a sign from the heaven, tempting him;

¹² and having sighed deeply in his spirit, he saith, `Why doth this generation seek after a sign? Verily I say to you, no sign shall be given to this generation.'

¹³ And having left them, having entered again into the boat, he went away to the other side;