(19) بَابُ مَا كَانَ النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ يُعْطِي الْمُؤَلَّفَةَ قُلُوبُهُمْ وَغَيْرَهُمْ مِنَ الْخُمُسِ وَنَحْوِهِ
Narrated Jubair bin Mut`im:
That while he was with Allah's Messenger (ﷺ) who was accompanied by the people on their way back from Hunain, the bedouins started begging things of Allah's Messenger (ﷺ) so much so that they forced him to go under a Samura tree where his loose outer garment was snatched away. On that, Allah's Messenger (ﷺ) stood up and said to them, "Return my garment to me. If I had as many camels as these trees, I would have distributed them amongst you; and you will not find me a miser or a liar or a coward."
Reference: Sahih al-Bukhari 3148
In-book reference: Book 57, Hadith 56
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 4, Book 53, Hadith 376