Hadith 3202
Narrated Wathilah ibn al-Asqa: The Messenger of Allah ﷺ led us in prayer over bier of a Muslim and I heard him say: O Allah, so and so, son of so and so, is in Thy protection, so guard him from the trial in the grave. (Abdur Rahman in his version said: "In Thy protection and in Thy nearer presence, so guard him from the trial in the grave) and the punishment in Hell. Thou art faithful and worthy of praise. O Allah, forgive him and show him mercy. Thou art the forgiving and the merciful one. " Abdur Rahman said: "On the authority of Marwan ibn Janah. "
Hadith 5081
Abu al-Darda said: if anyone says seven times morning and evening; “Allah sufficeth me: there is no god but He; on him is my trust- he, the Lord of the Throne (of glory) Supreme”, Allah will be sufficient for him against anything which grieves him, whether he is true or false in (repeating) them.