Ahmed Idris in Al-Haraz, and this man established the khalwa at his own expense. He was responsible for the care of the students and paid the sheikhs who taught the Quran. Among the khalwas of the region are also the khalwa of Al-Shakra, the khalwa in Al-Jazeera Al-Ula, the khalwa of Abu Salim, and the khalwa of Al-Misbah family, which is Al-Misbah Muhammad Abdullah from the Tahiriyab. Muhammad Al-Misbah moved this khalwa to Kassala. Among the most prominent who worked in teaching the Quran and contributed to its memorization, in addition to those we have mentioned, is Taj Al-Mawla Muhammad Issa, who began teaching the Quran in the Al-Hamadab region and then moved to Athira, where he established a khalwa in the Al-Ma'ish area in the early twentieth century. He returned in 1938 to Al-Hamadab. Among them also is Saad Wad Al-Nujum, who also had a khalwa. Among these is the scholar Al-Sharif Katdura from the Katdura family. The Katdura family has been known for their proficiency in reading and writing for a long time, and their home was a center of knowledge, and people would come to them from different directions to write letters or to learn about religious matters. Among the fourth generation in the twentieth century who memorized the Quran are: Al-Aboudi, Wadood Shaya', Abdullah Wad Ahmed, Muhammad Ahmed Al-Hussein Al-Sharif, and Hussein Mukhtar. Local residents believe that all the khalwas ended by the late 1940s, and perhaps the khalwa of Al-Taf'een continued to teach students until the early 1960s, around 1950. Among the khalwas that existed perhaps towards the end of the last century, or in the latter half of it, was the khalwa of Al-Qatin. It is an ancient, great archaeological village, the home of the Tahiriyab family, known for the Quran, rapid progress in religious sciences, and adherence to the Service method. Among the first who studied in the khalwa of Al-Qatin was one of the sons of Thori from Al-Hamadab, named Wad Qubail. He was a student, but he did not stay long and returned to Thori. Among the Quranic sheikhs who contributed to the establishment of the Quranic khalwas in Al-Hamadab and worked in teaching there was Sheikh Sayed Ahmed Al-Faqir. There is also the khalwa of Muhammad.

The system of sustenance in the khalwa in the past: The khalwa relied on two systems regarding the food, clothing, and housing of its students. The first system: One of the benefactors would undertake the expenses of the students and commit to providing food. 24 Abdul Hamid Balla Al-Noor, Social and Economic Study of the Educated in the Construction of Merowe Dam, July 2002 Merowe Dam Implementation Unit, Ministry of Irrigation and Financial Resources - 42 - - 42 -