Psalms 55:10

No wickedness so distresses the believer, as that which he witnesses in those who profess to be of the church of God. Let us not be surprised at the corruptions and disorders of the church on earth, but long to see the New Jerusalem. He complains of one that had been very industrious against him. God often destroys the enemies of the church by dividing them. And an interest divided against itself cannot long stand. The true Christian must expect trials from professed friends, from those with whom he has been united; this will be very painful; but by looking unto Jesus we shall be enabled to bear it. Christ was betrayed by a companion, a disciple, an apostle, who resembled Ahithophel in his crimes and doom. Both were speedily overtaken by Divine vengeance. And this prayer is a prophecy of the utter, the everlasting ruin, of all who oppose and rebel against the Messiah.

Day and night they go about it upon the walls thereof. The city, the holy city had become a den of wickedness; conspirators met in the dark, and talked in little knots in the streets even in broad daylight. Meanwhile the country was being roused to revolt, and the traitors without threatened to environ the city, and act in concert with the rebels within. No doubt there was a smothered fire of insurrection which Absalom kindled and fanned, which David perceived with alarm some time before he left Jerusalem; and when he quitted the city it broke out into an open flame. Mischief also and sorrow are in the midst of it. Unhappy capital to be thus beset by foes, left by her monarch, and filled with all those elements of turbulence which breed evil and trouble. Unhappy king to be thus compelled to see the mischief which he could not avert laying waste the city which he loved so well. There was another King whose many tears watered the rebellious city, and who said, "O Jerusalem, Jerusalem, how often would I have gathered thy children together, even as a hen gathereth her chickens under her wings, and ye would not!"