Al-Hasan (may Allah have mercy on him) says that Sayyiduna Aqil bin Abi Talib (may Allah be pleased with him) married a woman of the tribe of Banu Jusham in Basrah, and the people said to him: Congratulations, and they also congratulated him on (the prospect of) sons. Sayyiduna Aqil (may Allah be pleased with him) said: "Do not say that, for the Messenger of Allah (peace and blessings be upon him) forbade it and commanded us to say: 'Barakallahu lakum, wa baraka 'alaykum' (May Allah bless you and send blessing upon you)."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب النكاح / 13842