from the nephew of 'Abdullah bin Salam who said: "When they were after 'Uthman, 'Abdullah bin Salam came, and 'Uthman said to him: 'What did you come for?' He said: 'I came to assist you.' He said: 'Go to the people to repel their advances against me. For verily your going is better to me than your entering here.'" He said: "So 'Abdullah bin Salam went to the people and said: 'O you people! During Jahiliyyah I was named so-and-so, then the Messenger of Allah (ﷺ) named me 'Abdullah, and some Ayat from the Book of Allah were revealed about me. (The following) was revealed about me: 'A witness from among the Children of Isra'il has testified to something similar, and believed while you rejected. Verily, Allah does not guide the wrongdoing people. (46:10)" And (the following) was revealed about me: 'Sufficient as a witness between me and you is Allah, and those too who have knowledge of the Scripture. (13:43)" Allah has sheathed the sword from you and the angels are your neighbors in this city of yours, the one in which the Revelation came to your Prophet. But by Allah! (Fear) Allah regarding this man; if you kill him, then by Allah! If you kill him, then you will cause the angels to remove your goodness from you, and to raise Allah's sheathed sword against you, such that it will never be sheathed again until the Day of Resurrection.'" He said: "They said: 'Kill the Jew and kill 'Uthman.'"
Jami` at-Tirmidhi Book 47, Hadith 308
Teach me the words which I should (often) utter. He said: Utter," There is no god but Allah, the One, having no partner with Him. Allah is the Greatest of the great and all praise is due to Him. Hallowed be Allah, the Lord of the worlds, there is no Might and Power but that of Allah, the All-Powerful and the Wise." He (that desert Arab) said: These all (glorify) my Lord. But what about me? Thereupon he (the Holy Prophet) said: You should say:" O Allah, grant me pardon, have mercy upon me, direct me to righteousness and provide me sustenance." Musa (one of the narrators) said: I think he also said:" Grant me safety." But I cannot say for certain whether he said this or not. Ibn Abi Shaiba has not made a mention of the words of Musa in his narration.
Sahih Muslim Book 48, Hadith 43