اللَّهُمَّ أَكْثِرْ مَالَهُ وَوَلَدَهُ وَبَارِكْ لَهُ فِيمَا أَعْطَيْتَهُ
Allahumma akthir malahu wa waladahu wa barik lahu fima a'taytahu
O Allah, increase his wealth and children, and bless him in what You have given him.
The Prophet made this dua for Anas (RA)
Anas (RA) became one of the wealthiest Companions with many children and grandchildren due to this blessed dua.