Mk. 8: 11-13
The Pharisees came forward and began to argue with Jesus,
seeking from him a sign from heaven to test him.
He sighed from the depth of his spirit and said,
“Why does this generation seek a sign?
Amen, I say to you, no sign will be given to this generation.”
Then he left them, got into the boat again,
and went off to the other shore.