Verse 239

فَإِنْ خِفْتُمْ فَرِجَالًا أَوْ رُكْبَانًا فَإِذَآ أَمِنتُمْ فَٱذْكُرُوا۟ ٱللَّهَ كَمَا عَلَّمَكُم مَّا لَمْ تَكُونُوا۟ تَعْلَمُونَ

Furthermore, if you feel insecure, then observe it while walking or riding. Once you are secure, then, remember God as He taught you everything you did not know.