Hadithcore
Al-Adab Al-Mufrad, 653
sahih· Al-Albani

Anas said, "The Prophet, (ﷺ), used to come to us, the people of his house. One day he came to us and made supplication for us. Umm Sulaym said, 'Won't you make supplication for your little servant?' He said, 'O Allah, give him a lot of wealth and children. Make him live long and forgive him.'

حَدَّثَنَا عَارِمٌ، قَالَ‏:‏ حَدَّثَنَا سَعِيدُ بْنُ زَيْدٍ، عَنْ سِنَانٍ، قَالَ‏:‏ حَدَّثَنَا أَنَسٌ قَالَ‏:‏ كَانَ النَّبِيُّ صلى الله عليه وسلم يَدْخُلُ عَلَيْنَا، أَهْلَ الْبَيْتِ، فَدَخَلَ يَوْمًا فَدَعَا لَنَا، فَقَالَتْ أُمُّ سُلَيْمٍ خُوَيْدِمُكَ أَلاَ تَدْعُو لَهُ‏؟‏ قَالَ‏:‏ اللَّهُمَّ، أَكْثِرْ مَالَهُ وَوَلَدَهُ، وَأَطِلْ حَيَاتَهُ، وَاغْفِرْ لَهُ‏.‏

References2 variants
In-Book Reference
Book 31, Hadith 50
English Reference
Book 31, Hadith 653