Task: Question Answering
Input (English): Passage: Based on the archaeological evidence it has been suggested that Alodia's capital Soba underwent its peak development between the 9th and 12th centuries. In the 9th century, Alodia was, albeit briefly, described for the first time by the Arab historian al-Yaqubi. In his short account, Alodia is said to be the stronger of the two Nubian kingdoms, being a country requiring a three-month journey to cross. He also recorded that Muslims would occasionally travel there.A century later, in the mid-10th century, Alodia was visited by traveler and historian Ibn Hawqal, resulting in the most comprehensive known account of the kingdom. He described the geography and people of Alodia in considerable detail, giving the impression of a large, polyethnic state. He also noted its prosperity, having an "uninterrupted chain of villages and a continuous strip of cultivated lands". When Ibn Hawqal arrived, the ruling king was named Eusebius, who was, upon his death, succeeded by his nephew Stephanos. Another Alodian king from this period was David, who is known from a tombstone in Soba. His rule was initially dated to 999–1015, but based on paleographical grounds it is now dated more broadly, to the 9th or 10th centuries.Ibn Hawqal's report describing Alodia's geography was largely confirmed by al-Aswani, a Fatimid ambassador sent to Makuria, who went on to travel to Alodia. In a similar manner to al-Yaqubi's description of 100 years before, Alodia was noted as being more powerful than Makuria, more extensive and having a larger army. The capital Soba was a prosperous town with "fine buildings, and extensive dwellings and churches full of gold and gardens", while also having a large Muslim quarter. 
Question: Who recorded that Muslims would occasionally travel to Alodia?
Output (English): al-Yaqubi.