Sahih al-Bukhari 2591
صحيح البخاري#2591Sahihحَدَّثَنَا 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 ".
Narrated Asma:Allah's Messenger (ﷺ) 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
Scholarly Authentication
The label above is the grade most of these scholars gave — one dissenting opinion no longer speaks for all of them. If any scholar calls a narration fabricated, that verdict is shown instead, whatever the others say. Each scholar's own wording:
Every narration in Sahih al-Bukhari is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 51:25