דברי הימים ב ה:ב פירוש: רש״י

Then Solomon assembled the elders of Israel He conducted [the matter] with the attribute of wisdom, in that he gathered the elders, and not the youths, [which was] better than David [had done,] who gathered even the youths, as it is written, “And David assembled all the leaders of Israel...Jerusalem” (I Chron. 28:1).