Further east he passed through Kunduz, where he stayed for some time to witness the funeral rites of Prince Tardu, who had been poisoned. Here he met the monk Dharmasimha, and on the advice of the late Tardu made the trip westward to Balkh (modern Afghanistan), to see the Buddhist sites and relics, especially the Nava Vihara, which he described as the westernmost vihara (monastery) in the world. Here Xuanzang also found over 3,000 non-Mahayana monks, including Prajnakara (般若羯羅 or 慧性), a monk with whom Xuanzang studied early Buddhist scriptures. He acquired the important text of the "Mahāvibhāṣa" () here, which he later translated into Chinese.