While in exile in Kurdistan, some“most eminent doctors and most distinguished students” requested Bahá’u’lláh to elucidate “the abstruse passages” in a famous religious book

That seat of learning [theological seminary that Bahá’u’lláh was staying at] had been renowned for its vast endowments, its numerous takyihs, and its association with Saláhi’d-Dín-i-Ayyúbí and his descendants; from it some of the most illustrious exponents of Sunní Islám had gone forth to teach its precepts, and now a delegation, headed by Shaykh Ismá‘íl himself, and consisting of its most eminent doctors and most distinguished students, called upon Bahá’u’lláh, and, finding Him willing to reply to any questions they might wish to address Him, they requested Him to elucidate for them, in the course of several interviews, the abstruse passages contained in the Futúhát-i-Makkíyyih, the celebrated work of the famous Shaykh Muḥyi’d-Dín-i-‘Arabí. 

- Shoghi Effendi (‘God Passes By’, chapter 7)

Bahá’u’lláh’s impact on the people of Kurdistán

Not long after Baha’u’llah’s arrival in Kurdistán, Shaykh Sultán [The father-in-law of Áqáy-i-Kalím, Bahá’u’lláh’s brother] has related, He was able, through His personal contacts with Shaykh ‘Uthmán, Shaykh ‘Abdu’r-Rahmán, and Shaykh Ismá‘íl, the honored and undisputed leaders of the Naqshbandíyyih, the Qádiríyyih and the Khálidíyyih Orders respectively, to win their hearts completely and establish His ascendancy over them. The first of these, Shaykh ‘Uthmán, included no less a person than the Sulṭán himself and his entourage among his adherents. The second, in reply to whose query the “Four Valleys” was later revealed, commanded the unwavering allegiance of at least a hundred thousand devout followers, while the third was held in such veneration by his supporters that they regarded him as co-equal with Khálid himself, the founder of the Order. 

- Shoghi Effendi  (‘God Passes By’, chapter 7)

The father-in-law of Áqáy-i-Kalím, Bahá’u’lláh’s brother, arrived in Sulaymáníyyih when He had moved to that town

Meantime His friends in Baghdád had discovered His whereabouts, and had dispatched Shaykh Sultán, the father-in-law of Áqáy-i-Kalím, to beg Him to return; and it was now while He was living in Sulaymáníyyih, in a room belonging to the Takyiy-i-Mawláná Khálid (theological seminary) that their messenger arrived. “I found,” this same Shaykh Sulṭán, recounting his experiences to Nabíl, has stated, “all those who lived with Him in that place, from their Master down to the humblest neophyte, so enamoured of, and carried away by their love for Bahá’u’lláh, and so unprepared to contemplate the possibility of His departure that I felt certain that were I to inform them of the purpose of my visit, they would not have hesitated to put an end to my life.”

- Shoghi Effendi (‘God Passes By’, chapter 7)

Bahá’u’lláh transferred His residence to the town of Sulaymáníyyih

Shortly after this contact was established, [a certain Shaykh, a resident of Sulaymáníyyih] Shaykh Ismá‘íl, the leader of the Khálidíyyih Order, who lived in Sulaymáníyyih, visited Him, and succeeded, after repeated requests, in obtaining His consent to transfer His residence to that town. 

- Shoghi Effendi (‘God Passes By’, chapter 7)

As a result of a dream a resident of Sulaymáníyyih sought Bahá’u’lláh out while He was living in caves of Kurdistán

Bahá’u’lláh was still pursuing His solitary existence on that mountain when a certain Shaykh, a resident of Sulaymáníyyih, who owned a property in that neighborhood, sought Him out, as directed in a dream he had of the Prophet Muhammad. 

- Shoghi Effendi (‘God Passes By’, chapter 7)