Sahih Muslim 1054
Sahih Muslim · Book 12: The Book of Zakat · Sufficient provision and contentment
'Amr b. al-'As reported Allah's Messenger (ﷺ) as saying:
حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ ، حَدَّثَنَا أَبُو عَبْدِ الرَّحْمَنِ الْمُقْرِئُ ، عَنْ سَعِيدِ بْنِ أَبِي، أَيُّوبَ حَدَّثَنِي شُرَحْبِيلُ، - وَهُوَ ابْنُ شَرِيكٍ - عَنْ أَبِي عَبْدِ الرَّحْمَنِ الْحُبُلِيِّ ، عَنْ عَبْدِ اللَّهِ، بْنِ عَمْرِو بْنِ الْعَاصِ أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ " قَدْ أَفْلَحَ مَنْ أَسْلَمَ وَرُزِقَ كَفَافًا وَقَنَّعَهُ اللَّهُ بِمَا آتَاهُ " .
He Is successful who has accepted Islam, who has been provided with sufficient for his want and been made contented by Allah with what He has given him.