اللَّهُمَّ أَنْتَ السَّلَامُ، وَمِنْكَ السَّلَامُ، تَبَارَكْتَ يَا ذَا الْجَلَالِ وَالْإِكْرَامِ
Allahumma antas-salam, wa minkas-salam, tabarakta ya dhal-jalali wal-ikram
O Allah, You are Peace and from You is peace. Blessed are You, O Owner of Majesty and Honor.
Said after the salam, following istigfar
Acknowledging that Allah is the source of all peace and blessings.