2:239
فَإِنْ خِفْتُمْ فَرِجَالًا أَوْ رُكْبَانًا ۖ فَإِذَآ أَمِنتُمْ فَٱذْكُرُوا۟ ٱللَّهَ كَمَا عَلَّمَكُم مَّا لَمْ تَكُونُوا۟ تَعْلَمُونَ
fa-in khif'tum farijālan aw ruk'bānan fa-idhā amintum fa-udh'kurū l-laha kamā ʿallamakum mā lam takūnū taʿlamūna
If you are in danger, pray when you are out walking or riding; when you are safe again, remember God, for He has taught you what you did not know.
And if you fear (an enemy), perform Salât (pray) on foot or riding. And when you are in safety, offer the Salât (prayer) in the manner He has taught you, which you knew not (before).