"A man came when Messenger of Allah had already prayed, so he said: 'Which of you will give some reward to this person?' So a man stood to pray with him."  

جَاءَ رَجُلٌ وَقَدْ صَلَّى رَسُولُ اللَّهِ ﷺ فَقَالَ أَيُّكُمْ يَتَّجِرُ عَلَى هَذَا فَقَامَ رَجُلٌ فَصَلَّى مَعَهُ قَالَ وَفِي الْبَابِ عَنْ أَبِي أُمَامَةَ وَأَبِي مُوسَى وَالْحَكَمِ بْنِ عُمَيْرٍ