Musnad Ahmad 1738

It was narrated that ‘Abdullah bin Muhammad bin "Aqeel said: ’Aqeel bin Abi Talib got married. He came out to us and we said: May you live in harmony and be given sons. He said: Stop; do not say that, because the Prophet (ﷺ) told us not to say that, and he said: "Say: May Allah bless you and bless her for you.”