Matthew 16:1-6

1 The Pharisees also and the Sadducees came, and, tempting, desired him that he would show them a sign from heaven.
2 He answered and said to them, When it is evening, ye say, [It will be] fair weather: for the sky is red.
3 And in the morning, [It will be] foul weather to-day: for the sky is red and lowering. O [ye] hypocrites, ye can discern the face of the sky; but can ye not [discern] the signs of the times?
4 A wicked and adulterous generation seeketh for a sign; and there shall no sign been to it, but the sign of the prophet Jonah. And he left them, and departed.
5 And when his disciples had come to the other side, they had forgotten to take bread.
6 Then Jesus said to them, Take heed and beware of the leaven of the Pharisees and of the Sadducees.
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