Mark 8:10-13

10And he immediately got into the boat with his disciples and went to the district of Dalmanutha.

11The Pharisees came and began to argue with him, demanding of him a sign from heaven to test him.

12Sighing deeply in his spirit, he said, “Why does this generation demand a sign? Truly I tell you, no sign will be given to this generation.”

13Then he left them, got back into the boat, and went to the other side.