2 Samuel 16:13

“And as David and his men went by the way, etc.] In the high road that led to Bahurim, taking no notice of the cursing of Shimei, which made him bolder and more impudent; here is a large pause in the Hebrew text, in the midst of this verse: Shimei went along on the hill side over against him; as David and his men walked in the plain, he went on a range of hills that ran along right against them: and cursed as he went; continued his curses and imprecations, to which he was the more emboldened by the behaviour of David and his men: and threw stones at him, and cast dust; in a way of contempt, though the stones recoiled on his own head, and the dust flew in his own face, as the consequence of…”

“went along on the hill's side over against him--as he descended the rough road on the eastern side of the Mount of Olives, "went along on the hill's side"--literally, "the rib of the hill." threw stones at him--as a mark of contempt and insult. cast dust--As if to add insult to injury, clouds of dust were thrown by this disloyal subject in the path of his unfortunate sovereign.”

“cursed: Sa2 16:5, Sa2 16:6 cast dust: Heb. dusted him with dust, Act 23:23; It was an ancient custom, in those warm and arid countries, to lay the dust before a person of distinction, by sprinkling the ground with water. Dr. Pococke and the consul were treated with this respect when they entered Cairo. The same custom is alluded to in the well-known fable of Phedrus, in which a slave is represented going before Augustus and officiously laying the dust. To throw dust in the air while a person was passing was therefore an act of great disrespect; to do so before a sovereign prince, an indecent outrage. But it is probable that Shimei meant more than disrespect and outrage to this afflicted…”

“"So David went with his men on the way, whilst Shimei went on the slope of the hill opposite to him, cursing continually, and pelted with stones over against him, and with earth." לעמּתו means over against him in both instances. It is not expressly stated that Shimei threw stones and earth at David, but this is implied in the context. 2 Kings (2 Samuel) 16:14”