Cave of Adullam
From Wikipedia, the free encyclopedia
The Cave of Adullam was originally an underground cavern and/or fortress (*) referred to in the Old Testament, near the town of Adullam, in which David, already anointed to succeed Saul as king, sought refuge from the latter (e.g. 1 Samuel 22 ff). However, it is used more generally to refer to groups of political outsiders plotting their comeback or the overthrow of the status quo, especially after recent defeat; such plotters are sometimes referred to as Adullamites.
(*) The word for cave is usually used but the word for fortress, which has a similar appearance in writing, is used as well. Of course, given that this was a bandits' hideout, it would be reasonable to describe this as a fortified cave.