Surah Al-Baqara Verse 239

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

Fa in khiftum farijaalan aw rukbaanan fa izaaa amintum fazkurul laaha kamaa 'allamakum maa lam takoonoo ta'lamoon

Translation / The Meaning

And if you fear [an enemy, then pray] on foot or riding. But when you are secure, then remember Allah [in prayer], as He has taught you that which you did not [previously] know.