1 Kings 2:8

With thee, i.e. in thy power, as that phrase is oft used. Cursed me with a grievous curse; or, reproached me with bitter reproaches, 2 Samuel 16:7,8; which David could not but deeply resent from him, though, as it was an affliction sent from God, he patiently submitted to it. I will not put thee to death with the sword. Quest. How then could David lawfully engage Solomon to punish him for it? And did David upon his death-bed bear malice against Shimei? Answ. First, David was not a private person, which might remit such offences without any inconvenience; but a public magistrate, who for the honour and maintenance of government was obliged to punish such insolent and opprobrious speeches, if the necessity of his affairs had not then engaged him to pass it by. Otherwise it appears from divers passages of the Psalms, and of this history, how free David was from a rancorous and revengeful spirit, even towards his enemies. Secondly, The following advice is not contrary to David's oath, both because that was only personal, that David would not kill him either at that time, as Abishai desired him, or whilst he lived, and did not oblige his successors; and especially, because it was not David's mind that Shimei should be put to death for that fault, (as is evident; for then there was no need of Solomon's wisdom to find out an occasion, but only of his justice to punish him for the old crime,) but for some other competent crime, which Solomon's wisdom, narrowly prying into all his actions, would easily find out. And if the condition which Solomon imposed upon Shimei, 1 Kings 2:36,37, seem hard, it must be remembered that David only swore that he would pardon him as to life, but not that he would exempt him from all punishment or confinement.