Easton's Bible Dictionary (1897)
Knocking, an encampment of the Israelites in the wilderness (Num. 33:12). It was in the desert of Sin, on the eastern shore of the western arm of the Red Sea, somewhere in the Wady Feiran.
Smith's Bible Dictionary (1863)
(cattle-driving), a place mentioned (Numbers 33:12) as a station in the desert where the Israelites encamped.
Hastings' Dictionary of the Bible (1898) & Schaff's Bible Dictionary
DOPH'KAH (cattle-driving), an encampment of Israel in the wilderness. Num 33:12-13; somewhere in Wady Feiran.
Hitchcock's Bible Names (1869)
a knocking