Matthew 16:1

The Pharisees and Sadducees. These were widely opposite in their religious sentiments to each other, but closely united in their design of persecuting Jesus Christ, and they come and ask of him a sign or prodigy from heaven, to convince them that he was the Christ, the Messias. (Bible de Vence) --- The Sadducees deny the immortality of the soul, and affirm that our only obligation is the observance of the law; insomuch, that they prided themselves on their right of disputing the most important points with their teachers. This sect is not numerous, and chiefly composed of men of condition, who, when properly qualified for offices of state, are compelled to conform, at least in appearance, to the principles of the Pharisees; otherwise, they would incur the resentment of the Pharisees. (Josephus, Book xviii. chap. ii.) See also note on ver. 7, chap. iii, above. --- St. John Chrysostom is of opinion he would have granted them any sign they wished, had they been willing to believe; but as their object was curiosity and censure, he refused to comply. They mistrusted, it would seem, his other miracles as the effect of some occult quality inherent in him, and wished to see a miracle performed upon distant objects in the heavens or clouds, which would be to them less suspicious and objectionable. (Haydock)