Ahmed Raza Khan: Mohammed Aqib Qadri:
And if you are in fear, pray while on foot or while
riding, as you can; when you are in peace remember Allah the
way He has taught you, which you did not know.
Yusuf Ali:
If ye fear (an enemy), pray on foot, or riding, (as may be
most convenient), but when ye are in security, celebrate Allah's praises in
the manner He has taught you, which ye knew not (before).
Pickthal:
And if ye go in fear, then (pray) standing or on horseback.
And when ye are again in safety, remember Allah, as He hath taught you that
which (heretofore) ye knew not.