The Prophet ﷺ said: When a man goes out of his house and says:
bismi Allāhi tawakkaltu ʿalā Allāh, lā ḥawla wa-lā quwwata illā bi-Allāh
(In the name of Allah, I trust in Allah; there is no might and no power but in Allah,)
the following will be said to him at that time: "You are guided, defended and protected." The devils will go far from him and another devil will say: How can you deal with a man who has been guided, defended and protected?
أَنَّ النَّبِيَّ ﷺ قَالَ: إِذَا خَرَجَ الرَّجُلُ مِنْ بَيْتِهِ فَقَالَ:
(بِسْمِ اللَّهِ تَوَكَّلْتُ عَلَى اللَّهِ لاَ حَوْلَ وَلاَ قُوَّةَ إِلاَّ بِاللَّهِ)
قَالَ يُقَالُ حِينَئِذٍ: هُدِيتَ وَكُفِيتَ وَوُقِيتَ فَتَتَنَحَّى لَهُ الشَّيَاطِينُ۔ فَيَقُولُ لَهُ شَيْطَانٌ آخَرُ: كَيْفَ لَكَ بِرَجُلٍ قَدْ هُدِيَ وَكُفِيَ وَوُقِيَ