(238) Maintain with care the [obligatory] prayers and [in particular] the middle prayer and stand before Allah, devoutly obedient. (239) 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.

(114) And establish prayer at the two ends of the day and at the approach of the night. Indeed, good deeds do away with misdeeds. That is a reminder for those who remember.

(78) Establish prayer at the decline of the sun [from its meridian] until the darkness of the night and [also] the Qur"an of dawn. Indeed, the recitation of dawn is ever witnessed.