It never happened that Messenger of Allah ﷺ was asked anything for the sake of Islam and he did not give that. There came to him a person and he gave him a large flock (of sheep and goats) and he went back to his people and said: My people, embrace Islam, for Muhammad gives so much charity as if he has no fear of want.  

مَا سُئِلَ رَسُولُ اللَّهِ ﷺ 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  

O people, embrace Islam. By Allah, Muhammad donates so much as if he did not fear want. Anas said that the person embraced Islam for the sake of the world but later he became Muslim until Islam became dearer to him than the world and what it contains. (Using translation from Muslim 2312b)   

أَنَّ رَجُلًا سَأَلَ النَّبِيَّ ﷺ غَنَمًا بَيْنَ جَبَلَيْنِ فَأَعْطَاهُ إِيَّاهُ فَأَتَى قَوْمَهُ فَقَالَ أَيْ قَوْمِ أَسْلِمُوا فَوَاللهِ إِنَّ مُحَمَّدًا لَيُعْطِي عَطَاءً مَا يَخَافُ الْفَقْرَ فَقَالَ أَنَسٌ إنْ كَانَ الرَّجُلُ لَيُسْلِمُ مَا يُرِيدُ إِلَّا الدُّنْيَا فَمَا يُسْلِمُ حَتَّى يَكُونَ الْإِسْلَامُ أَحَبَّ إِلَيْهِ مِنَ الدُّنْيَا وَمَا عَلَيْهَا