مسائل المنتخبه (Articles Of Islamic Acts) - الخوئي، السيد أبوالقاسم - الصفحة ١٩٩ - RECOMMENDED THINGS

if the place where one has to place ones forehead while per- forming prostration is impure, the prayers would be void even if that place is dry. And the recommended precaution is that the place where one offers prayers should not be impure at all.
The Sixth Condition: It is necessary that there should he a distance of at least one span between a man and a woman while they are offering prayers, and it is abominable for them to offer prayers when the distance between them is less than ten cubits.
٨٩٦. If a woman stands by the sides of a man, or at a distance less than one span ahead of him and both of them begin offering prayers, they should offer their prayers again. However, if one of them begins offering the prayers earlier only that one of them who commences his prayers later should offer his or her Prayers again.
٨٩٧. If a man and a woman are standing side by side with each other or the woman is standing ahead and they are offer- ing prayers and there is a wall, curtain, or something else between them on account of which they cannot see each other, the prayers of both of them are in order, although the distance between them may not be even one span.
The Seventh Condition: The place, where the person offering prayers has to place his forehead while performing prostration, should not be higher or lower than four joined fingers as com- pared with the place where he puts the toes of his feet. The details of this nile will be given in the article relating to pros- tration.
٨٩٨. Presence of a non-mehram man and woman at a place where none else is present, and none can also arrive, is unlawful, in case there is a possibility of theirindulging in sin, and the recommended precaution is that they should not offer prayers at that place.
٨٩٩. Prayers offered at a place where musical or other similar instrument is being played is not void, although hearing and using it amounts to sin.