quran quotes:

But if you are in danger, then (say your prayers) on foot or on horseback; and when you are secure, then remember Allah, as He has taught you what you did not know. (The Cow 2.239)

But if they repent and keep up prayer and pay the poor-rate, they are your brethren in faith; and We make the communications clear for a people who know. (The Immunity 9.11)