Sunan an-Nasa'i, Hadith 2550 ⓘ
It was narrated from Asma' bint Abi Bakr that the Prophet said to her: "Do not count what you give, otherwise Allah, the Mighty and Sublime, will count what He gives to you."
أَخْبَرَنَا مُحَمَّدُ بْنُ آدَمَ، عَنْ عَبْدَةَ، عَنْ هِشَامِ بْنِ عُرْوَةَ، عَنْ فَاطِمَةَ، عَنْ أَسْمَاءَ بِنْتِ أَبِي بَكْرٍ، أَنَّ النَّبِيَّ صلى الله عليه وسلم قَالَ لَهَا " لاَ تُحْصِي فَيُحْصِيَ اللَّهُ عَزَّ وَجَلَّ عَلَيْكِ " .
also referenced under: Book 23, Hadith 0 (In-Book) & Volume 3, Book 23, Hadith 2551 (DarusSalam)