Whenever a delegation came to the Prophet ﷺ with their charity, he would say, "Allah, send blessings upon the family of so-and-so." Ubayy came to him with his charity, and the Prophet ﷺ said, "Allah, send blessings upon the family of Abu Awfa."
كان النبي ﷺ إذا أتاه قوم بصدقتهم قال: اللهم صل على آل فلان. فأتاه أبي بصدقته، فقال: اللهم صل على آل أبي أوفى.
Bukhari reported it in the Book of Zakat (1497), and Muslim in the Book of Zakat (1078), both through Shuba, from Amr bin Mura, who said, I heard Abdullah bin Abu Awfa say, then he related it. The wording given is Bukhari's, and Muslim's wording is similar.