Abdullah bin Abi al-Hudhayl narrates: The earlier people liked that when a person had performed the prayer, he should recite:
'Allahumma anta al-salam, wa minka al-salam, tabarakta ya dha al-jalali wa al-ikram'
(O Allah, You are the Giver of peace, and peace comes only from You; Blessed are You, O Possessor of Majesty and Honour).
Abu Ya'la recorded it, and its narrators are the narrators of the Sahih.
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الأذكار / 16921