Sahih Muslim 2481 b
Anas reported:
My mother Umm Anas came to Allah's Messenger (ﷺ). And she prepared my lower garment out of the half of her headdress and (with the other half) she covered my upper body and said: Allah's Messenger, here is my son Unais; I have brought him to you for serving you. Invoke blessings of Allah upon him. Thereupon he (the Holy Prophet) said: O Allah, make an increase in his wealth, and progeny. Anas said: By Allah, my fortune is huge and my children, and grand-children are now more than one hundred.
حَدَّثَنِي أَبُو مَعْنٍ الرَّقَاشِيُّ، حَدَّثَنَا عُمَرُ بْنُ يُونُسَ، حَدَّثَنَا عِكْرِمَةُ، حَدَّثَنَا إِسْحَاقُ،
 حَدَّثَنَا أَنَسٌ، قَالَ جَاءَتْ بِي أُمِّي أُمُّ أَنَسٍ إِلَى رَسُولِ اللَّهِ صلى الله عليه وسلم وَقَدْ أَزَّرَتْنِي
 بِنِصْفِ خِمَارِهَا وَرَدَّتْنِي بِنِصْفِهِ فَقَالَتْ يَا رَسُولَ اللَّهِ هَذَا أُنَيْسٌ ابْنِي أَتَيْتُكَ بِهِ يَخْدُمُكَ
 فَادْعُ اللَّهَ لَهُ ‏.‏ فَقَالَ ‏
"‏ اللَّهُمَّ أَكْثِرْ مَالَهُ وَوَلَدَهُ ‏"‏ ‏.‏ قَالَ أَنَسٌ فَوَاللَّهِ إِنَّ مَالِي لَكَثِيرٌ وَإِنَّ
 وَلَدِي وَوَلَدَ وَلَدِي لَيَتَعَادُّونَ عَلَى نَحْوِ الْمِائَةِ الْيَوْمَ ‏.‏