Riyad as-Salihin: The Book of the Remembrance of Allah – Hadith No. 778 — Uthman bin ‘Affan (May Allah be pleased with him) reported: The Messenger of… (Hadith No. 778)

'Uthman bin 'Affan (May Allah be pleased with him) reported: The Messenger of Allah (ﷺ) said, "He who recites three times every morning and evening: 'Bismillahil-ladhi la yadurru ma'as-mihi shai'un fil-ardi wa la fis-sama'i, wa Huwas-Sami'ul-'Alim (In the Name of Allah with Whose Name there is protection against every kind of harm in the earth or in the heaven, and He is the All-Hearing and All- Knowing),' nothing will harm him.".

Explanation:

Reference: Riyad as-Salihin, The Book of the Remembrance of Allah, Hadith No. 778