Hadith No: 1
Ibn al-Athir - Asad al-Ghabah fi Ma'rifat al-Sahabah - Letter S
Chapter on the Letters S and 'Ayn - 2089: Sa'id ibn Uthman al-Ansari
Volume: (2) - Page Number: (487)
- Sa'id ibn Uthman al-Ansari al-Zurqi, the brother of Uqbah, narrated that Muhammad ibn Ishaq reported from Yahya ibn Ubad ibn Abdullah ibn al-Zubayr, from his father, from Abdullah ibn al-Zubayr, from al-Zubayr, who said: "By Allah, I could hear the words of Mu'tab ibn Qusayr, my brother from the sons of Amr ibn Awf, while drowsiness was overcoming me. I could hear him only like in a dream when he said: 'If we had any say in the matter, we would not be killed here.'" Then he said: {“Indeed, those who turned back among you on the day the two armies met, it was only Satan who caused them to slip with some of what they had earned, and Allah had certainly pardoned them. Indeed, Allah is Forgiving and Forbearing”} (Surah Al-Imran 3:155). So, those whom Satan caused to slip, and then Allah forgave, include: Uthman ibn Affan, Sa'id ibn Uthman, and Alqamah ibn Uthman.

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Reference: Osad al-Ghabah fi Ma'refah al-Shahabah Book 2

Hadith No: 2
Ibn al-Athir - Asad al-Gabah fi Ma'rifat al-Sahabah - Letter R
Chapter on Ra with Alif - 1602: Rafi' ibn al-Mu'alla Abu Sa'id
Volume: (2) - Page Number: (246)
[The text is lengthy, so only the relevant excerpt is provided here]
- .... Ibn Mundhir said: It was revealed about him and his companions: {Indeed, those who turned back among you on the day the two armies met, it was Satan who caused them to slip because of some of what they had earned, and Allah had certainly forgiven them. Indeed, Allah is Forgiving, Forbearing (Al-Imran 3:155)}. He narrated with his chain from Abu Salih from Ibn Abbas, who said: It was revealed concerning Uthman, and Abu Hudhayfah ibn Utbah, and Rafi' ibn al-Mu'alla the Ansari, and Khawjah ibn Zayd, who turned back on the day the two armies met.

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Reference: Osad al-Ghabah fi Ma'refah al-Shahabah Book 2

Hadith No: 3
Ibn al-Athir - al-Nihayah fi Gharib al-Hadith wa al-Athar - Letter 'Ayn - Chapter 'Ayn with Ya' - 'Ayn
Volume: (3) - Page Number: (334)
[The text is lengthy, so only the relevant excerpt is provided here]
- .... And in the hadith about Uthman, it is mentioned that Abd al-Rahman ibn Awf said to him, implying: "I did not flee on the day of 'Aynayn," to which he replied, "Why do you reproach me with a sin that Allah has already forgiven?" 'Aynan: the name of a mountain near Uhud, and it is also said that the day of Uhud is the day of 'Aynayn, and it is the mountain that the archers stood on that day.

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Reference: Al Nihaayaa fi gareeb al hadis wal asar Book 3