فَإِنْ خِفْتُمْ فَرِجَالًا أَوْ رُكْبَانًا فَإِذَا أَمِنتُمْ فَاذْكُرُوا اللَّهَ كَمَا عَلَّمَكُم مَّا لَمْ تَكُونُوا تَعْلَمُونَ

and should you fear [a danger], then [pray] on foot or mounted, and when you are safe remember Allah, as He taught you what you did not know.