مسائل المنتخبه (Articles Of Islamic Acts) - الخوئي، السيد أبوالقاسم - الصفحة ١٧٥ - THE PRAYERS WHICH SHOULD BE A PERFORMED IN SEQUENCE

whether or not he has offered the midday prayers, he should turn his intention to the midday prayers.However, if the time is so short that after his completing the prayers the sun would set, and sufficient time will not be left for offering even one unit, he should completethe prayers with the intention of afternoon prayers.
٧٦٧. If while offering the night prayers a man doubts before the bowing of fourth unit whether or not he has offered dusk prayers, and if the time is so short thatafter the completion of the prayers it will be midnight and time will not be left even for offering one unit of prayers, he should complete the prayers with the intention ofnight prayers. In case, however, he has more time than this, he sbould tum his intention to dusk prayers and complete the prayers with ٣ units, and th offer the nightprayers.
٧٦٨. If while offering night prayers a person doubts after reaching the bowing of the ٤th unit whether or not he has offered dusk prayers and if the time is shorthe should complete the night prayers and if the time is sufficient for offering ٥ units he should break the prayers and offer the dusk and the night prayers.
٧٦٩. If a person who has offered a prayers offers it again as a measure of precaution and while offering that prayers he recollects that he has not offered prayerswhich he should have offered earlier than that, he cannot tum his intention to that prayers. For example, when he is offering the afternoon prayers aa a measure of precautionhe recollects that he has not offered the midday prayers he cannot turn his intention to the midday prayers.
٧٧٠. It is not permissible to turn ones intention from qaza to the prayers which is offered within the prescribed time and from a recommended prayers to anobligatory prayers.
٧٧١. If a person has sufficient time at his disposal to offer