Sayyiduna Muawiyah bin Qurrah narrates from his father: I came to the service of the Prophet (peace be upon him) with a group from the tribe of Muzaynah. We pledged allegiance to the Prophet (peace be upon him). At that time, the buttons of his shirt were open. After the pledge, with the permission of the Prophet (peace be upon him), I put my hand inside his blessed shirt and touched and saw the Seal of Prophethood. The narrator of the hadith, Urwah, says: Whenever I saw Muawiyah and his son, whether in winter or summer, I always saw the buttons of their shirts open; they would never fasten them.