Sahih al-Bukhari, Volume 3, Book 47, Hadith 764 (USC-MSA) ⓘ
Narrated Asma: Allah's Messenger said, "Give (in charity) and do not give reluctantly lest Allah should give you in a limited amount; and do not withhold your money lest Allah should withhold it from you."
حَدَّثَنَا عُبَيْدُ اللَّهِ بْنُ سَعِيدٍ، حَدَّثَنَا عَبْدُ اللَّهِ بْنُ نُمَيْرٍ، حَدَّثَنَا هِشَامُ بْنُ عُرْوَةَ، عَنْ فَاطِمَةَ، عَنْ أَسْمَاءَ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ " أَنْفِقِي وَلاَ تُحْصِي فَيُحْصِيَ اللَّهُ عَلَيْكِ، وَلاَ تُوعِي فَيُوعِيَ اللَّهُ عَلَيْكِ " .
also referenced under: Book 51, Hadith 25 (In-Book) & Hadith 2591 (DarusSalam)