The Kabenna is a river of central Ethiopia

Ethiopia

Ethiopia , officially known as the Federal Democratic Republic of Ethiopia, is a country located in the Horn of Africa. It is the second-most populous nation in Africa, with over 82 million inhabitants, and the tenth-largest by area, occupying 1,100,000 km2...

. It is a tributary of the Awash River

Awash River

The Awash is a major river of Ethiopia. Its course is entirely contained within the boundaries of Ethiopia, and empties into a chain of interconnected lakes that begin with Lake Gargori and end with Lake Abbe on the border with Djibouti, some 100 kilometers from the head of the Gulf of Tadjoura...

 on the left side, having its source to the southwest of Ankobar. G.W.B. Huntingford speculates it may be the same river as the Kuba, which is mentioned in the Futuh al-habaša ("The Conquest of Ethiopia"), the narrative of Imam

Imam

An imam is an Islamic leadership position, often the worship leader of a mosque and the Muslim community. Similar to spiritual leaders, the imam is the one who leads Islamic worship services. More often, the community turns to the mosque imam if they have a religious question...

 Ahmad Gragn's conquest of Ethiopia.