Sahih al-Bukhari, Volume 8, Book 75, Hadith 355 (USC-MSA) ⓘ
Narrated Anas: My mother said, "O Allah's Messenger! Please invoke Allah on behalf of your servant." He said, "O Allah! Increase his wealth and children, and bestow Your Blessing on whatever You give him." a time of distress.
حَدَّثَنَا عَبْدُ اللَّهِ بْنُ أَبِي الأَسْوَدِ، حَدَّثَنَا حَرَمِيٌّ، حَدَّثَنَا شُعْبَةُ، عَنْ قَتَادَةَ، عَنْ أَنَسٍ ـ رضى الله عنه ـ قَالَ قَالَتْ أُمِّي يَا رَسُولَ اللَّهِ خَادِمُكَ أَنَسٌ ادْعُ اللَّهَ لَهُ. قَالَ " اللَّهُمَّ أَكْثِرْ مَالَهُ وَوَلَدَهُ، وَبَارِكْ لَهُ فِيمَا أَعْطَيْتَهُ " .
also referenced under: Book 80, Hadith 41 (In-Book) & Hadith 6344 (DarusSalam)