Jami at-Tirmidhi 3388 (hasan sahih, al-Albani)

قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏ "‏ مَا مِنْ عَبْدٍ يَقُولُ فِي صَبَاحِ كُلِّ يَوْمٍ وَمَسَاءِ كُلِّ لَيْلَةٍ بِسْمِ اللَّهِ الَّذِي لاَ يَضُرُّ مَعَ اسْمِهِ شَيْءٌ فِي الأَرْضِ وَلاَ فِي السَّمَاءِ وَهُوَ السَّمِيعُ الْعَلِيمُ ثَلاَثَ مَرَّاتٍ فَيَضُرُّهُ شَيْءٌ ‏"‏ ‏.‏ وَكَانَ أَبَانُ قَدْ أَصَابَهُ طَرَفُ فَالَجِ فَجَعَلَ الرَّجُلُ يَنْظُرُ إِلَيْهِ فَقَالَ لَهُ أَبَانُ مَا تَنْظُرُ أَمَا إِنَّ الْحَدِيثَ كَمَا حَدَّثْتُكَ وَلَكِنِّي لَمْ أَقُلْهُ يَوْمَئِذٍ لِيُمْضِيَ اللَّهُ عَلَىَّ قَدَرَهُ ‏.‏

“Aban bin `Uthman said:“I heard `Uthman bin `Affan (ra) saying: ‘The Messenger of Allah ﷺ said: “There is no worshiper who says, in the morning of every day, and the evening of every night: ‘In the Name of Allah, who with His Name, nothing in the earth or the heavens can cause harm, and He is the Hearing, the Knowing (Bismillāh, alladhi lā yaḍurru ma`a ismihi shai'un fil-arḍi wa lā fis-samā', wa huwas-Samī`ul `Alīm)’ – three times, (except that) nothing shall harm him.” And Aban had been stricken with a type of semi-paralysis, so a man began to look at him, so Aban said to him, “What are you looking at? Indeed the Hadith is as I reported it to you, but I did not say it one day, so Allah brought about His decree upon me.””