تحفة النظار في غرايب الامصار وعجايب الاسفار 13.70: ذكر سلطانها

He is called Kuwayl — with u on the k, in the diminutive form — and he is one of the greatest sultans of al-Malībār. He has many ships that sail to ʿUmān, Fārs and Yemen, and among his towns are Dah Fattan and Bud Fattan, which we shall mention.

We went from Jurfattan to the city of Dah Fattan — with a on the undotted d and h without vowel; we have already given the spelling of fattan. It is a large city on an estuary, with many gardens, and in it there are coconuts, pepper, areca nut and betel, and much taro, with which they cook meat. As for bananas, I have not seen anywhere in the country more of them, or cheaper, than there.

In it is the great tank (bāʾin), five hundred paces long and three hundred paces wide, lined with dressed red stone. Along its sides are twenty-eight stone domes, in each of which are four stone seats, and each dome is reached by stone steps. In its middle is a large dome of three storeys, with four seats in each storey.

I was told that it was the father of this sultan Kuwayl who built this tank. Opposite it is a congregational mosque for the Muslims, with steps leading down to it, from which people perform their ablutions and bathe. The jurist Ḥusayn told me that

the one who built the mosque and the tank as well was one of Kuwayl's ancestors, that he was a Muslim, and that there is a wonderful story about his conversion to Islam, which we shall relate.