Invocation
For one you have insulted
قال صلى الله عليه وسلم: "اللَّهُم فأيما مؤمن سببته فاجعل ذلك له قربة إليك يوم القيامة"
O Allah, whomever of the believers I have abused, give him the reward of a sacrificial slaughter for it on the Day of Resurrection.
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.