مسائل المنتخبه (Articles Of Islamic Acts) - الخوئي، السيد أبوالقاسم - الصفحة ٢٣٠ - SAJDATAYN(TWO PROSTRATIONS)

which is higher than four joined fingers as compared with the place, where the toes of his feet rest, heshould raise his head and place it on a thing, which is not high or its height is about four joined fingers or less than that, and on the basis of precaution, he should offerthe prayers again after completing it.
١٠٦٩. It is necessary that there should be nothing between the forehead of the person offering prayers and the thing on which he offers prostration. Hence, if themohr (earthen tablet) is dirty and the forehead does not reach the mohr itself the prostration is void. There is, however, no harm if for example, the color of the mohrundergoes a change.
١٠٧٠. In prostration the person offering prayers should place the two palms of his hands on the ground. In a state of helplessness, however, there is no harm inplacing the back of the hands on the ground, and if even this is not possible, he should, on the basis of precaution, place the wrists of hands on the ground. And in case hecannot do even this, he should place any part of the body up to his elbow on the ground, and if even this is not possible it is sufficient to place the arms on the earth.
١٠٧١. In prostration the person offering prayers should place his two big toes on the earth, and if he places other toes of the foot or its upper part on ground orowing to the nails being long his big toes do not reach the ground his prayers is void. And a person, who has been offering his prayers in this manner owing to his negligenceor because of his being unaware of the rule, should offer his prayers again.
١٠٧٢. If a part of the big toe is cut off the person concerned should place the remaining part of it on the ground and if nothing of it has remained or what hasremained is too short he should, on the basis of precaution, place the remaining toes on the ground and if he has no toes he should place on the ground whatever part of thefoot is intact.
١٠٧٣. If a person performs prostration in an unusual manner