In the preface to "The Moonstone", Vishnu commands 3 Brahmins in this country to guard the title gem night & day
[DOC] [TLE] The Moonstone [PAR] that time forth, by three priests in turn, night and day, to the end of the generations 
of ... successors of the three Brahmins watched their priceless Moonstone, night 
... when the will of Vishnu the Preserver should restore to them their sacred gem.