Musannaf Ibn Abi Shaybah 31226 — What is said after the prayers

Then I prayed beside Sayyiduna Abdullah bin Amr (may Allah be pleased with him) and heard him say these same words, so I said to him: "I have heard Sayyiduna Ibn Umar (may Allah be pleased with them both) also say the same words that you have said." Sayyiduna Abdullah bin Amr (may Allah be pleased with him) said: "Indeed, I heard the Messenger of Allah (peace and blessings be upon him) recite these words at the end of his prayer."