2 Samuel 19:23

The king sware unto him. David's magnanimity was not the result merely of policy, but also of joyful feeling at seeing all the tribes so readily welcome him back to the throne. But in spite of his oath, he orders Solomon to execute him, regarding what he had done as a sin past forgiveness. In so doing we can hardly acquit David of breaking his oath, even granting that Shimei's repentance was insincere, and that the motive of his actions was the desire simply to save his life. But we must remember that our Lord described his injunction, "that ye love one another," as "a new commandment" ( John 13:34 ); and the utmost that can be said in David's favour is that his character was generous and full of chivalry. A half excuse may be found for his order in the supposition that Shimei was an inveterate conspirator, and dangerous to Solomon's peace. This view seems confirmed by the command given to Shimei to build a house at Jerusalem ( 1 Kings 2:36 ), where he would always be under surveillance. But had not David himself praised the man who "sweareth to his own hurt, and changeth not" ( Psalms 15:4 )?