ENOfficial
It was narrated from `Aqil bin Abu Talib: that he married a woman from Banu Jusham, and they said: “May you live in harmony and have many sons.” He said: “Do not say that, rather say what the Messenger of Allah (ﷺ) said: 'Allahumma barik lahum wa barik `alaihim (O Allah, bless them and bestow blessings upon them).' ”
Source: sunnah.com
Other translations
Arabic
حَدَّثَنَا مُحَمَّدُ بْنُ بَشَّارٍ، حَدَّثَنَا مُحَمَّدُ بْنُ عَبْدِ اللَّهِ، حَدَّثَنَا أَشْعَثُ، عَنِ الْحَسَنِ، عَنْ عَقِيلِ بْنِ أَبِي طَالِبٍ، أَنَّهُ تَزَوَّجَ امْرَأَةً مِنْ بَنِي جُشَمٍ فَقَالُوا بِالرِّفَاءِ وَالْبَنِينَ فَقَالَ لاَ تَقُولُوا هَكَذَا وَلَكِنْ قُولُوا كَمَا قَالَ رَسُولُ اللَّهِ ـ صلى الله عليه وسلم ـ " اللَّهُمَّ بَارِكْ لَهُمْ وَبَارِكْ عَلَيْهِمْ " .
sunnah.com