Matthew 16:1-4
Then the Pharisees and Sadducees came, and testing Him asked that He would show them a sign from heaven. 2 He answered and said to them, “When it is evening you say, ‘It will be fair weather, for the sky is red’; 3 and in the morning, ‘It will be foul weather today, for the sky is red and threatening.’ Hypocrites! You know how to discern the face of the sky, but you cannot discern the signs of the times. 4 A wicked and adulterous generation seeks after a sign, and no sign shall be given to it except the sign of the prophet Jonah.” And He left them and departed.
Then the Pharisees and Sadducees came, and testing Him asked that He would show them a sign from heaven. 2 He answered and said to them, “When it is evening you say, ‘It will be fair weather, for the sky is red’; 3 and in the morning, ‘It will be foul weather today, for the sky is red and threatening.’ Hypocrites! You know how to discern the face of the sky, but you cannot discern the signs of the times. 4 A wicked and adulterous generation seeks after a sign, and no sign shall be given to it except the sign of the prophet Jonah.” And He left them and departed.
Matthew Henry's Commentary 1706 on Matthew 16:3-4
[1.] “Do you not see that the Messiah is come?” The miracles Christ wrought, and the gathering of the people to him, were plain indications that the kingdom of heaven was at hand, that this was the day of their visitation.
[2.] “Do not you foresee your own ruin coming for rejecting him? You will not entertain the gospel of peace, and can you not evidently discern that hereby you pull an inevitable destruction upon your own heads?” Note, It is the undoing of multitudes, that they are not aware what will be the end of their refusing Christ.
He refuses to give them any other sign (v. 4), as he had done before in the same words, ch. 12:39. Those that persist in the same iniquities, must expect to meet with the same reproofs. Here, as there, (1.) He calls them an adulterous generation; because, while they professed themselves of the true church and spouse of God, they treacherously departed from him, and brake their covenants with him.