Amr bin Murrah says: I heard Abdullah bin Abi Awfa (may Allah be pleased with him), who was among the people of Bay'at al-Ridwan, (say) that when people came to the Messenger of Allah (peace and blessings be upon him) with their charity, he (peace and blessings be upon him) would say: 'Allahumma salli 'alayhim' (O Allah, send Your mercy upon them). My respected father came to him (peace and blessings be upon him) with his zakah, and he (peace and blessings be upon him) said: 'Allahumma salli 'ala ali Abi Awfa' (O Allah, send mercy upon the family of Abu Awfa).
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 2874