The second of the Seven Khwajagan of the Bukhara Oasis was Arif-Riwakri (d. 1239). He was one of the four main students of Ghujdawani and the direct inheritor of his teachings. He was now buried in the village of Safirkon (apparently at one time known as Riwarkar), twenty-five miles north of Bukhara.
Mosque at the burial site of Riwakri . . . For more see Seven Saints of Bukhara: The Khwajagan, or Masters of Wisdom.