Sahih Muslim Book - 43, Hadith - 6020

وَحَدَّثَنَا عَاصِمُ بْنُ النَّضْرِ التَّيْمِيُّ ، حَدَّثَنَا خَالِدٌ ، يَعْنِي ابْنَ الْحَارِثِ ، حَدَّثَنَا حُمَيْدٌ ، عَنْ مُوسَى بْنِ أَنَسٍ ، عَنْ أَبِيهِ ، قَالَ : مَا سُئِلَ رَسُولُ اللهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ عَلَى الإِسْلاَمِ شَيْئًا إِلاَّ أَعْطَاهُ ، قَالَ : فَجَاءَهُ رَجُلٌ فَأَعْطَاهُ غَنَمًا بَيْنَ جَبَلَيْنِ ، فَرَجَعَ إِلَى قَوْمِهِ ، فَقَالَ : يَا قَوْمِ أَسْلِمُوا ، فَإِنَّ مُحَمَّدًا يُعْطِي عَطَاءً لاَ يَخْشَى الْفَاقَةَ.

It was narrated from Musa bin Anas that his father said: “The Messenger of Allah (s.a.w) was never asked for anything for the sake of Islam but he would give it. A man came and he gave him a large number of sheep. He went back to his people and said: ‘O people, become Muslim, for Muhammad (s.a.w) gives as if he has no fear of want.”’