Musa bin Uqbah said: Al-Yaman was the father of Sayyiduna Hudhayfah (may Allah be pleased with him); his name was Husayl bin Jubayr, and he was an ally of theirs from Banu Abs. He was martyred at the hands of the Muslims in the battle, and it was not known who had martyred him, so Sayyiduna Hudhayfah (may Allah be pleased with him) forgave his blood.
Musa bin Uqbah said: Urwah bin al-Zubayr (may Allah have mercy on him) said: The Muslims made a mistake that day, and their swords fell upon him, thinking him to be of the enemy. Sayyiduna Hudhayfah (may Allah be pleased with him) cried out: "My father! My father!" But no one heeded him, and they martyred him. He said: "May Allah forgive you, and He is the Most Merciful of those who show mercy" [Surah Yusuf: 92]. Then the Prophet (peace and blessings be upon him) paid his blood money, and this increased Hudhayfah in good standing with him.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب القسامة / 16477