مسائل المنتخبه (Articles Of Islamic Acts) - الخوئي، السيد أبوالقاسم - الصفحة ٢١٦ - QIYAM (TO STAND)

he will become ill, or will meet some harm, he can offer prayers in a sitting posture. and if he isafraid of sitting also, he on offer the prayers in a lying posture.
٩٨٥. If a person considers it probable that in the last part of the time prescribed for prayers he will be able to offer prayers standing, it is better that heshould delay the prayers. In case. however, he cannot stand, he should offer prayers according to his obligation, when the time is coming to an end. And in case he offersprayers in the early part of the prescribed time and becomes able to stand when the time is coming to the end he should offer the prayers again.
٩٨٦. It is recommended for the person offering prayers that while standing he should keep his body straight, slope down his shoulders, place his hands on histhighs, join his fingers with each other, look at the place of prostration, place the weight of his body equally on the two feet, should be submissive and humble, and shouldnot place his feet backwards and forwards. If the person offering the prayers is a man, he should keep distance between his feet equal to a minimum of three open fingers, anda maximum of one span, and if she is a woman. she should keep her feet joined.
 QIRAT (RECITING THE SURAH HAMD AND OTHER SURAH OF HOLY QURAN)
QIRAT (RECITING THE SURAH HAMD AND OTHER SURAH OF HOLY QURAN)
٩٨٧. While offering the daily obligatory prayers one should recite Surah al-Hamd in the first and second unit and thereafter one should, on the basis of precaution,recite one complete surah in each of the said two units. While offering prayers Surah az Zuha and Surah inshirah are treated to be one surah, and the same is the case withSurah al-Fiil and Quraysh.
٩٨٨. If the time is short for the prayers, or a person is obliged not to recite the surah e.g. if he fears that if he recites the sura a thief, a beast, orsomething else, will do him harm, he should not recite the surah.