Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) narrates: We did not know what to recite in prayer. We used to recite: Peace be upon Allah, peace be upon Sayyiduna Jibreel, peace be upon Sayyiduna Mika'il. Then the Prophet (peace and blessings of Allah be upon him) taught us. He said: Indeed, Allah Himself is the Giver of Peace. When you sit after performing two rak'ahs, recite this: "All verbal, physical, and financial acts of worship are exclusively for Allah. O Prophet, peace be upon you, and the mercy of Allah and His blessings. Peace be upon us and upon all the righteous servants of Allah." Abu Wa'il, the narrator, in his narration from Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him), also transmitted these words from the Prophet (peace and blessings of Allah be upon him): "When you recite this, your greeting (Islam) will reach every righteous servant in the heavens and the earth." Abu Ishaq, another narrator, in his narration from Sayyiduna Abdullah (may Allah be pleased with him), transmitted these words: "When you recite them, your greeting (Islam) will reach every close servant and sent Prophet (the narrator is unsure, perhaps these are the words:) righteous servant." (Then recite this:) "I bear witness that there is no deity except Allah, and I bear witness that Muhammad is His servant and His Messenger."