Smith's Bible Dictionary (1863)
(weeping), The Valley of, A valley in Palestine, through which the exiled Psalmist sees in vision the pilgrims passing in their march towards the sanctuary of Jehovah at Zion. (Psalms 84:6) That it was a real locality is most probable from the use of the definite article before the name. e. the Ge-Hinnom or ravine below Mount Zion.
Hastings' Dictionary of the Bible (1898) & Schaff's Bible Dictionary
BA'CA (weeping). " Ps 84:6.
Hitchcock's Bible Names (1869)
a mulberry-tree