The fifth part of the first teaching.

From the lands, most of the land of Abyssinia is drained, and a number of its countries and its largest cities are all Jinnia, which is a civilized city located in a distant wilderness from civilization. Its civilization extends, and it is connected to the river that flows into the Nile, which cuts through the land of Abyssinia. It has on it the city of Markala and the city of Al-Najahah. This river originates from the equator and reaches the end of the inhabited world from the south, passing westward with the north until it reaches the land of Nubia, where it flows into a branch of the Nile that surrounds the city of Blay, as we have described. It is a large, wide river with abundant water, slow-flowing, and has settlements on it. Many travelers have been mistaken on this river, saying it is the Nile, because they see in it what they see in the Nile in terms of its emergence, its length, and its flow at the time when the Nile's flood is customary. This river, at its confluence with the Nile, causes confusion. For this reason, most people have been mistaken about it. They did not distinguish between it and the Nile when they saw that it did not possess the noble qualities that we have mentioned and confirmed what we said, that it is not the Nile, based on what the ancient writings have stated in this field. They have narrated the qualities of this river, its source, its flow, and its origin in the branch of the Nile near the city of Blay. Ptolemy mentioned this in his book "Geography," and Hassan bin Al-Mundhir mentioned it in his book "The Tormented When Mentioning Rivers and Their Sources and Locations," and described what is not worthy of being recorded or what an ignorant scholar searching for his purpose in books would miss. And on this river, the best of the Abyssinians' valleys are located, and most of their livelihoods are derived from it.