Allāhumma fa'ayyumā mu'minin sababtuhu
faj`al dhālika lahu qurbatan ilayka yawma ‘l-qiyāmah.
O Allah, whomever of the believers I have abused, give him the reward of a sacrificial slaughter for it on the Day of Resurrection.
Reference:
Al-Bukhari, cf. Al-Asqalani, Fathul-Bari 11/171, Muslim 4/2007. The wording
in Muslim's report is: 'make it a purification for him and a source of
mercy.
