Referenced in the context of the treatment of eye disease (conjunctivitis): ‘another method of treating this disease… suggests the symbolical heart-cleansing of the hajis at Jebel Nur near Mekka.‘
Source
The Achehnese, Vol. II, by Dr. C. Snouck Hurgronje, translated by A.W.S. O’Sullivan, indexed by R.J. Wilkinson. Leyden: E.J. Brill, 1906.