ADULLAM in the Bible Encyclopedia - ISBE
(1) A city, with dependencies, and in ancient times having a king, mentioned five times in the Old Testament, each time in a list with other cities (Josh 12:15; 15:35; 2 Ch 11:7; Mic 1:15; Neh 11:30). In the list of 31 kings whom Joshua smote, Adullam follows Hormah, Arad, Libnah, and precedes Makkedah. Among the 14 Judahite cities of the first group in "the lowland" Adullam is mentioned between Jarmuth and Socoh. In the list of 15 cities fortified by Rehoboam it appears between Socoh and Gath. Micah gives what may be a list of cities concerned in some Assyrian approach to Jerusalem; it begins with Gath, includes Lachish, and ends with Mareshah and Adullam. And Adullam is still in the same company in the list in Nehemiah of the cities "and their villages" where the men of Judah then dwelt. In the time of the patriarchs it was a place to which men "went down" from the central mountain ridge (Gen 38:1). Judas Maccabeus found it still existing as a city (2 Macc 12:38). Common opinion identifies Adullam with the ruin `Aid-el-Ma, 13 miles West-Southwest from Bethlehem (see HGHL, 229 ff). This is in spite of the testimony of the Onomasticon, which, it is alleged, confuses Adullam with Eglon. Presumably the city gave its name to the cave of Adullam, the cave being near the city...