حَدَّثَنَا عَبْدُ اللَّهِ بْنُ مُحَمَّدٍ النُّفَيْلِيُّ، حَدَّثَنَا زُهَيْرٌ، حَدَّثَنَا أَبُو الزُّبَيْرِ، عَنْ جَابِرٍ، قَالَ أَرْسَلَنِي نَبِيُّ اللَّهِ صلى الله عليه وسلم إِلَى بَنِي الْمُصْطَلِقِ فَأَتَيْتُهُ وَهُوَ يُصَلِّي عَلَى بَعِيرِهِ فَكَلَّمْتُهُ فَقَالَ لِي بِيَدِهِ هَكَذَا ثُمَّ كَلَّمْتُهُ فَقَالَ لِي بِيَدِهِ هَكَذَا وَأَنَا أَسْمَعُهُ يَقْرَأُ وَيُومِئُ بِرَأْسِهِ فَلَمَّا فَرَغَ قَالَ ‏"‏مَا فَعَلْتَ فِي الَّذِي أَرْسَلْتُكَ فَإِنَّهُ لَمْ يَمْنَعْنِي أَنْ أُكَلِّمَكَ إِلاَّ أَنِّي كُنْتُ أُصَلِّي ‏"

jabir said

The Prophet of Allah (ﷺ) sent me to Banu al-Mustaliq. I came to him while he was praying on his camel. I spoke to him, and he signaled to me with his hand like this. Then I spoke to him, and he signaled to me with his hand like this. I heard him reciting and nodding his head. When he finished, he said, "What have you done regarding what I sent you for? Nothing prevented me from speaking to you except that I was praying."