Easton's Bible Dictionary (1897)
House of rock, a town in the mountains of Judah (Josh. 15:58), about 4 miles to the north of Hebron. It was built by Rehoboam for the defence of his kingdom (2 Chr. 11:7). It stood near the modern ed-Dirweh. Its ruins are still seen on a hill which bears the name of Beit-Sur, and which commands the road from Beer-sheba and Hebron to Jerusalem from the south.
Smith's Bible Dictionary (1863)
(house of rock) a town in the mountains of Judah, built by Jeroboam, (Joshua 15:58; 2 Chronicles 11:7) now Beit-zur . It commands the road from Beersheba and Hebron, which has always been the main approach to Jerusalem from the south.
Hastings' Dictionary of the Bible (1898) & Schaff's Bible Dictionary
BETH'ZUR (house of rock), in the mountains of Judah; built by Rehoboam; its ruler helped to repair Jerusalem, 2 Chr 11:7; Neh 3:16; now Beit Sur, 4 miles north of Hebron.