Charles Spurgeon Commentary John 7:3-4

"His brethren therefore said unto him, Depart hence, and go into Judaea, that thy disciples also may behold thy works which thou doest. For no man doeth anything in secret, and himself seeketh to be known openly. If thou doest these things, manifest thyself to the world." — John 7:3-4 (ASV)

And the scribes and Pharisees brought unto him a woman taken in adultery; and when they had set her in the midst, they say unto him, Master, this woman was taken in adultery, in the very act.

They did this only to entangle the Saviour—not because they wanted to learn anything from him, or to do this woman any good, or even to vindicate morality; but it was simply an effort to entrap him.