Imam Hasan al-Basri (may Allah have mercy on him) said: Sayyiduna Aqil bin Abi Talib (may Allah be pleased with him) came to us and married a woman from Banu Jusham. He went in to her, then came out, and the people said: "May you have harmony and sons." He said: "Do not say this, for the Messenger of Allah (peace and blessings be upon him) forbade us from saying 'May you have harmony and sons' and ordered us to say: "May Allah bless you and send blessings upon you.""
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 14587