Matthew 16:1-7

1 The Pharisees and the Sadducees came to tempt him; they asked him to show them a sign from the heaven.
2 But he answered and said unto them, When it is evening, ye say, It will be fair weather, for the heaven is glowing with an aurora.
3 And in the morning, It will be foul weather today, for the heaven has an aurora and is cloudy. O ye hypocrites, ye know how to make decisions based on the face of the heaven, and regarding the signs of the times are ye unable?
4 A wicked and adulterous generation seeks after a sign; and no sign shall be given unto it, but the sign of the prophet Jonah. And he left them and departed.
5 And when his disciples were coming from the other side, they had forgotten to take bread.
6 Then Jesus said unto them, Take heed and keep yourselves from the leaven of the Pharisees and of the Sadducees.
7 And they reasoned among themselves, saying, It is because we have taken no bread.
The Jubilee Bible (from the Scriptures of the Reformation), edited by Russell M. Stendal, Copyright © 2000, 2001, 2010