Biography of Al-Harith ibn Ka'b ibn 'Amr
Al-Harith ibn Ka'b ibn Amr ibn 'Uwf ibn Mabdhul ibn Amr ibn Ghunm ibn Mazin ibn An-Najjar Al-Ansari Al-Najjari, then Al-Mazni.
He accompanied the Prophet ﷺ and was martyred on the Day of Yamama, mentioned by Al-Kalbi.