[AI] The Prophet's ﷺ flag was with Ali ibn Abi Talib, and the Ansar's flag was with Saad ibn Ubadah. When the battle intensified, the Messenger of Allah ﷺ would be among those under the Ansar's flag.

أَنَّ رَايَةَ النَّبِيِّ ﷺ مَعَ عَلِيِّ بْنِ أَبِي طَالِبٍ وَرَايَةَ الْأَنْصَارِ مَعَ سَعْدِ بْنِ عُبَادَةَ وَكَانَ إِذَا اسْتَحَرَّ الْقَتْلُ كَانَ رَسُولُ اللهِ ﷺ مِمَّا يَكُونَ تَحْتَ رَايَةِ الْأَنْصَارِ

[AI] The battalion of the Messenger of Allah ﷺ on the day of Badr consisted of Ali ibn Abi Talib, and the battalion of the Ansar was led by Saad ibn Ubada.

«كَانَ لِوَاءُ رَسُولِ اللهِ ﷺ يَوْمَ بَدْرٍ مَعَ عَلِيِّ بْنِ أَبِي طَالِبٍ وَلِوَاءُ الْأَنْصَارِ مَعَ سَعْدِ بْنِ عُبَادَةَ»

[AI] The banner of the Messenger of Allah ﷺ was in all the locations, the banner of the Muhajireen with Ali ibn Abi Talib, and the banner of the Ansar with Saad ibn Ubada.

كَانَتْ رَايَةُ رَسُولِ اللهِ ﷺ فِي الْمَوَاطِنِ كُلِّهَا رَايَةُ الْمُهَاجِرِينَ مَعَ عَلِيِّ بْنِ أَبِي طَالِبٍ وَرَايَةُ الْأَنْصَارِ مَعِ سَعْدِ بْنِ عُبَادَةَ

[AI] "Ali ibn Abi Talib was the bearer of the flag of the Prophet ﷺ on the day of Badr, and Ali was also the bearer of the flag of the Muhajireen in all the other battles, and Qais ibn Saad ibn Ubada was the bearer of the flag of Ali."

«أَنَّ عَلِيَّ بْنَ أَبِي طَالِبٍ كَانَ صَاحِبَ رَايَةِ رَسُولِ اللهِ ﷺ يَوْمَ بَدْرٍ وَصَاحِبُ رَايَةِ الْمُهَاجِرِينَ عَلِيٌّ وَفِي الْمَوَاطِنِ كُلِّهَا وَقَيْسُ بْنُ سَعْدِ بْنِ عُبَادَةَ صَاحِبُ رَايَةِ عَلِيٍّ»