Umayya bin Khalid bin al-'Aswad أمية بن خالد بن الأسود · Chapters on Tafsir

that the Prophet (ﷺ) said: "This Ayah was revealed about the people of Quba: In it are men who love to purify themselves. And Allah loves those who make themselves pure (9:108)." He said: "They used water to perform Istinja so this Ayah was revealed about them."