Narrated Hishams father (RA) :
When Allahs Apostle ﷺ set out (towards Makkah) during the year of the Conquest (of Makkah) and this news reached (the infidels of Quraish), Abu Sufyan (RA) , Hakim bin Hizam and Budail bin Warqa came out to gather information about Allahs Apostle ﷺ , They proceeded on their way till they reached a place called Marr-az-Zahran (which is near Makkah). Behold! There they saw many fires as if they were the fires of Arafat. Abu Sufyan (RA) said, "What is this? It looked like the fires of Arafat." Budail bin Warqa said, "Banu Amr are less in number than that." Some of the guards of Allahs Apostle ﷺ saw them and took them over, caught them and brought them to Allahs Apostle. Abu Sufyan (RA) embraced Islam.
When the Prophet ﷺ proceeded, he said to Al-Abbas, "Keep Abu Sufyan (RA) standing at the top of the mountain so that he would look at the Muslims. So Al-Abbas kept him standing (at that place) and the tribes with the Prophet ﷺ started passing in front of Abu Sufyan (RA) in military batches. A batch passed and Abu Sufyan (RA) said, "O Abbas Who are these?" Abbas said, "They are (Banu) Ghifar." Abu Sufyan (RA) said, I have got nothing to do with Ghifar." Then (a batch of the tribe of) Juhaina passed by and he said similarly as above. Then (a batch of the tribe of) Sad bin Huzaim passed by and he said similarly as above. then (Banu) Sulaim passed by and he said similarly as above. Then came a batch, the like of which Abu Sufyan (RA) had not seen. He said, "Who are these?" Abbas said, "They are the Ansar headed by Sad bin Ubadah, the one holding the flag." Sad bin Ubadah said, "O Abu Sufyan (RA) ! Today is the day of a great battle and today (what is prohibited in) the Ka’bah will be permissible." Abu Sufyan (RA) said., "O Abbas! How excellent the day of destruction is! "Then came another batch (of warriors) which was the smallest of all the batches, and in it there was Allahs Apostle ﷺ and his companions and the flag of the Prophet ﷺ was carried by Az-Zubair bin Al Awwam. When Allahs Apostle ﷺ passed by Abu Sufyan (RA) , the latter said, (to the Prophet), "Do you know what Sad bin Ubadah said?" The Prophet ﷺ said, "What did he say?" Abu Sufyan (RA) said, "He said so-and-so." The Prophet ﷺ said, "Sad told a lie, but today Allah will give superiority to the Ka’bah and today the Ka’bah will be covered with a (cloth) covering." Allahs Apostle ﷺ ordered that his flag be fixed at Al-Hajun.
Narrated Urwa (RA) : Nafi bin Jubair bin Mutim said, "I heard Al-Abbas saying to Az-Zubair bin Al-Awwam, O Abu Abdullah ! Did Allahs Apostle ﷺ order you to fix the flag here? " Allahs Apostle ﷺ ordered Khalid bin Al-Walid to enter Makkah from its upper part from Kada while the Prophet ﷺ himself entered from Kuda. Two men from the cavalry of Khalid bin Al-Wahd named Hubaish bin Al-Ashar and Kurz bin Jabir Al-Fihri were martyred on that day.