Aaron,
After searching Volo's Guide to the Sword Coast and Prayers of the Faithful to no avail, the Demihuman Deities supplement proved to be the proverbial jackpot. From page 69:
"Major Centers of Worship: Endar Aglandtor, the Sword Grotto, is an abbey of the Luckmaiden hidden in a series of dwarf-dug caverns hewn from the base of a granite uprising known as the Tor of Swords."
There is another paragraph or so of information about the temple. Let me know if you don't posess DD and I'll summarize for you.
EDIT: added page #....