Sahih Muslim , Book 43, Hadith 79 (In-Book) ⓘ

Anas 'b. Malik reported that a person requested Allah's Apostle to give him a very large flock and he gave that to him. He came to his tribe and said: 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.

حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا يَزِيدُ بْنُ هَارُونَ، عَنْ حَمَّادِ بْنِ سَلَمَةَ، عَنْ ثَابِتٍ، عَنْ أَنَسٍ، أَنَّ رَجُلاً، سَأَلَ النَّبِيَّ صلى الله عليه وسلم غَنَمًا بَيْنَ جَبَلَيْنِ فَأَعْطَاهُ إِيَّاهُ فَأَتَى قَوْمَهُ فَقَالَ أَىْ قَوْمِ أَسْلِمُوا فَوَاللَّهِ إِنَّ مُحَمَّدًا لَيُعْطِي عَطَاءً مَا يَخَافُ الْفَقْرَ ‏.‏ فَقَالَ أَنَسٌ إِنْ كَانَ الرَّجُلُ لَيُسْلِمُ مَا يُرِيدُ إِلاَّ الدُّنْيَا فَمَا يُسْلِمُ حَتَّى يَكُونَ الإِسْلاَمُ أَحَبَّ إِلَيْهِ مِنَ الدُّنْيَا وَمَا عَلَيْهَا ‏.‏