C. F. Keil and Franz Delitzsch on 2 Samuel 16:5-6

2Sa 16:5-6 Shimei’s cursing. - 2Sa 16:5, 2Sa 16:6. When the king had come to Bahurim, on the other side of the Mount of Olives, but not far off (see at 2Sa 3:16), there came out of that place a man of the family of the house of Saul, i.e., a distant relation of Saul, cursing him; and he pelted David and all his servants with stones, although all the people and all the heroes (the household troops and body-guard: 2Sa 15:17-18) were (marking) on the right and left of the king. The words “all the people,” etc., are a circumstantial clause.