Matthew 16:3-7 MSG

3 red sky at morning, sailors take warning.' You find it easy enough to forecast the weather - why can't you read the signs of the times?
4 An evil and wanton generation is always wanting signs and wonders. The only sign you'll get is the Jonah sign." Then he turned on his heel and walked away.
5 On their way to the other side of the lake, the disciples discovered they had forgotten to bring along bread.
6 In the meantime, Jesus said to them, "Keep a sharp eye out for Pharisee-Sadducee yeast."
7 Thinking he was scolding them for forgetting bread, they discussed in whispers what to do.