פירוש על משלי 26:27

He who digs a pit For example, Balaam, who persuaded Balak to cause Israel to sin and caused twenty-four thousand of them to fall. He came to Midian to demand his pay and was slain by Israel.

and he who rolls That is to say that whoever places a stumbling block will ultimately stumble on it.

and he who rolls a stone He rolls it from place to place so that people will stumble on it. The Aggadah (Tanhuma Buber, Vayera 28, see footnote 157) interprets it in reference to Abimelech, who slew his seventy brothers on one stone and his end was that he died by a stone, as it is said (Jud. 9:53): “And a certain woman cast a piece of an upper millstone upon Abimelech’s head and crushed his skull.”