John Gill Bible Commentary

But Absalom fled,.... He who promised his servants protection could not protect himself, and who no doubt fled with him; he knew what he had done was death by law, and that there was no city of refuge for such sort of murder as this, and he had no reason to hope the king would suffer so foul a crime as this to pass unpunished: and the young man that kept the watch lifted up his eyes, and looked: to the way that led from Absalom's house to Jerusalem, to see if he could spy any other messenger on the road from thence: and, behold, there came much people by the way of the hill side behind him; that is, behind the watchman, who, looking round him, saw them; these people were the king's sons and their attendants, who, being at some distance, the young man could not discern who they were; they did not come the direct road from Absalom's house, but came a round about way, for fear, as R. Isaiah rightly conjectures, lest Absalom should pursue, or send pursuers after them, and slay them; though others, as Kimchi, think this refers to the hill, and that the sense is, that the watchman saw them coming from the way which was behind the hill, and began to see them when they came to the side of it, which was the way that led to the city, surrounded by mountains, see Psa 125:2.