1 Kings 2:40

And Shimei arose, and saddled his ass, and went to Gath to
Achish to seek his servants
And demand them; through the passion he was in with his servants, and his hurry to get them home, and the covetous disposition which prevailed on him, he might forget, or be tempted to neglect, the prohibition he was under not to go out of Jerusalem; or he might think Solomon had forgot it; or that he could come and go secretly without his knowledge; or if he should know of it, he might hope he would never punish him with death for so small a fault; however, so it was ordered by the providence of God leaving him to his own lust, and the temptations of Satan, that he might suffer just punishment for cursing David:

and Shimei went and brought his servants from Gath;
for the king being at peace with Israel, and a tributary to them also, did not choose to detain them, but delivered them up lest it should be resented, and bring him into trouble.