Musnad Ahmad 163:2

Isma'il ibn Ibrahim narrated to us, Yunus narrated to us, from al-Hasan, that 'Aqil ibn Abi Talib married a woman from Banu Jusham. The people entered upon him and said: "With concord and sons." He said: "Do not say that." They said: "Then what should we say, O Abu Yazid?" He said: "Say: 'May Allah bless you, and may He send blessings upon you,' for that is what we were commanded to say."