Sahih al-Bukhari 2982
Narrated Salama:
Once the journey-food of the people ran short and they were in great need. So, they came to the 
Prophet to take his permission for slaughtering their camels, and he permitted them. Then `Umar met 
them and they informed him about it. He said, "What will sustain you after your camels (are 
finished)?" Then `Umar went to the Prophet (ﷺ) and said, "O Allah's Messenger (ﷺ)! What will sustain them 
after their camels (are finished)?" Allah's Messenger (ﷺ) said, "Make an announcement amongst the people 
that they should bring all their remaining food (to me)." (They brought it and) the Prophet (ﷺ) invoked 
Allah and asked for His Blessings for it. Then he asked them to bring their food utensils and the 
people started filling their food utensils with their hands till they were satisfied. Allah's Messenger (ﷺ) then 
said, "I testify that None has the right to be worshipped but Allah, and I am His Apostle. "
حَدَّثَنَا بِشْرُ بْنُ مَرْحُومٍ، حَدَّثَنَا حَاتِمُ بْنُ إِسْمَاعِيلَ، عَنْ يَزِيدَ بْنِ أَبِي عُبَيْدٍ، عَنْ سَلَمَةَ ـ رضى الله عنه قَالَ خَفَّتْ أَزْوَادُ النَّاسِ وَأَمْلَقُوا، فَأَتَوُا النَّبِيَّ صلى الله عليه وسلم فِي نَحْرِ إِبِلِهِمْ، فَأَذِنَ لَهُمْ، فَلَقِيَهُمْ عُمَرُ فَأَخْبَرُوهُ فَقَالَ مَا بَقَاؤُكُمْ بَعْدَ إِبِلِكُمْ فَدَخَلَ عُمَرُ عَلَى النَّبِيِّ صلى الله عليه وسلم فَقَالَ يَا رَسُولَ اللَّهِ مَا بَقَاؤُهُمْ بَعْدَ إِبِلِهِمْ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏"‏ نَادِ فِي النَّاسِ يَأْتُونَ بِفَضْلِ أَزْوَادِهِمْ ‏"‏‏.‏ فَدَعَا وَبَرَّكَ عَلَيْهِ، ثُمَّ دَعَاهُمْ بِأَوْعِيَتِهِمْ، فَاحْتَثَى النَّاسُ حَتَّى فَرَغُوا، ثُمَّ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏"‏ أَشْهَدُ أَنْ لاَ إِلَهَ إِلاَّ اللَّهُ، وَأَنِّي رَسُولُ اللَّهِ ‏"‏‏.‏