2 Samuel 20:15 - Clarke's commentary and critical notes on the Bible

And they came and besieged him in Abel of Bethmaachah, and they cast up a bank against the city, and it stood in the trench: and all the people that were with Joab battered the wall, to throw it down. They cast up a bank against the city - The word סללה solelah, which we render bank, means, most probably, a battering engine of some kind, or a tower overlooking the walls, on which archers and slingers could stand and annoy the inhabitants, while others of the besiegers could proceed to sap the walls. That it cannot be a bank that stood in the trench, is evident from the circumstance thus expressed.