Narrated Abdullah ibn Umar:

The Messenger of Allah ﷺ stood up, i.e. on the day of Badr, and said: Uthman has gone off on the business of Allah and His Apostle, and I shall take the oath of allegiance on his behalf. The Messenger of Allah ﷺ then allotted him a share, but did not do so for anyone else who was absent.

حَدَّثَنَا مَحْبُوبُ بْنُ مُوسَى أَبُو صَالِحٍ، أَخْبَرَنَا أَبُو إِسْحَاقَ الْفَزَارِيُّ، عَنْ كُلَيْبِ بْنِ وَائِلٍ، عَنْ هَانِئِ بْنِ قَيْسٍ، عَنْ حَبِيبِ بْنِ أَبِي مُلَيْكَةَ، عَنِ ابْنِ عُمَرَ، قَالَ إِنَّ رَسُولَ اللَّهِ ﷺ قَامَ - يَعْنِي يَوْمَ بَدْرٍ - فَقَالَ
" إِنَّ عُثْمَانَ انْطَلَقَ فِي حَاجَةِ اللَّهِ وَحَاجَةِ رَسُولِ اللَّهِ وَإِنِّي أُبَايِعُ لَهُ " . فَضَرَبَ لَهُ رَسُولُ اللَّهِ ﷺ بِسَهْمٍ وَلَمْ يَضْرِبْ لأَحَدٍ غَابَ غَيْرُهُ .