And this familiarity is not based on Shia narrations alone. There are non-Shia narrations that clarify the details for us.
Haka nan kuma ba wai kawai riwayoyin Shi'a ne suka yi wannan bayanin ba; hatta riwayoyin da ake da su wadanda ba na 'yan Shi'a ba, akwai su da suke mana irin wadannan bayanai.