It is narrated from Sayyiduna Uthman (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: Whoever recites this supplication three times in the morning «بِسْمِاللَّهِالَّذِيلَايَضُرُّمَعَاسْمِهِشَيْءٌفِيالْأَرْضِوَلَافِيالسَّمَاءِوَهُوَالسَّمِيعُالْعَلِيمُ», nothing will harm him until the evening, and whoever recites it in the evening, nothing will harm him until the morning, insha’Allah.
Hadith Referenceمسند احمد / مسند الخلفاء الراشدين / 528