593/766 عن أبي الطفيل: سأل ابن الكوّا عليّاً عن المجرّة؟قال: "هو شرج(1) السماء، ومنها فتحت السماء بماء منهمر".
It is narrated from Abu Tufail that Ibn al-Kawwa asked Sayyiduna Ali (may Allah be pleased with him) about the Milky Way: He said, "It is a valley in the sky; from there the sky is opened with extremely abundant rainwater."