Musnad Abu Ya'la al-Mawsili 150:216

'Abd al-A'la narrated to us, Khalid bin 'Abdullah narrated to us, from Abu Sinan, from 'Abdullah bin Abi al-Hudhayl, who said: They used to like, when a man finished the prayer, for him to say: "O Allah, You are Peace, and from You is peace. Blessed are You, O Possessor of Majesty and Honor."