17 – Sound (ṣaḥīḥ)

Abu Zayd ʿAmr ibn Akhtab al-Ansari said:
The Messenger of Allah ﷺ said to me, “Abu Zayd, come closer and rub my back.” So I rubbed his back, and my fingers touched the seal. I asked, “What is the seal?” He replied, “A small cluster of hairs.”