Jerusalem (Mount of Olives) - Cave of Gethsemane

Source: 
Epiph. mon. Hag., Enarr. Syriae
Abbreviation for Journals and Series
Paragraph: 
IX, 1-3
Translation: 

In the same place there is the Brook Kidron and the Valley of Jehoshaphat, and the garden where Christ was betrayed.

(transl. Wilkinson)

Bibliografical ref.: 
Bibliography
Wilkinson, J., 2002
Summary: 
Mention of the garden where Christ was betrayed in the Valley of Jehoshaphat, from an 8th cent. guidebook for pilgrims.