The Messenger of Allah ﷺ said, "I have been granted al-Kawthar, and there it was, a river flowing like this upon the surface of the earth. Its banks were domes of pearl, not hollowed out. I struck my hand into its soil, and behold, it was strongly fragrant musk, and its pebbles were pearls."
حدثنا عبد الصمد حدثنا حماد عن ثابت
قال رسول الله ﷺ أعطيت الكوثر فإذا هو نهر يجري كذا على وجه الأرض حافتاه قباب اللؤلؤ ليس مشفوفا فضربت بيدي إلى تربته فإذا مسكة ذفرة وإذا حصاه اللؤلؤ