2 Samuel 13:21

Was very wroth. David indeed was angry when he heard of this shameful act on the part of his son, but apparently because of the remembrance of his own misconduct he failed to see that justice was done. He felt that his hands were tied by his sin, and as a result he manifested toward his children a leniency that encouraged misconduct such as this. Earlier in life, in conscious integrity and unencumbered by the snares in which he later became entangled, he probably would have administered swift judgment. But now all he did was to manifest a display of wrath and allow the offender to go unpunished.