2:239
فَإِنْخِفْتُمْفَرِجَالًاأَوْرُكْبَانًا ۖفَإِذَآأَمِنتُمْفَٱذْكُرُوا۟ٱللَّهَكَمَاعَلَّمَكُممَّالَمْتَكُونُوا۟تَعْلَمُونَ٢٣٩
fa-in khif'tum farijālan aw ruk'bānan fa-idhā amintum fa-udh'kurū l-laha kamā ʿallamakum mā lam takūnū taʿlamūna
And if you fear [an enemy, then pray] on foot or riding. But when you are secure, then remember Allāh [in prayer], as He has taught you that which you did not [previously] know.(239)