John Wesley on 2 Samuel 11:27

The mourning - Which was seven days. Nor could the nature of the thing admit of longer delay, lest the too early birth of the child might discover David's sin. Bare a son - By which it appears, That David continued in the state of impenitency for divers months together; and this notwithstanding his frequent attendance upon God's ordinances. Which is an eminent instance of the corruption of man's nature, of the deceitfulness of sin, and of the tremendous judgment of God in punishing one sin, by delivering a man up to another.