Issue No.868- Whoever performs prayer or any other acts of worship in order to show off to people, his worship is not only void, rather he has also committed a major sin. Even if he has in mind both Allah (swt) and people, again his act is void and it is a major sin.
Issue No.786- Third: If a small piece of clothing of a prayer-performer with which the private parts cannot be covered (like skullcap and socks) becomes najis, the prayer performed with it is correct. The same ruling applies to a najis ring and eyeglasses.
Issue No. 1202- So long as a person is alive, no other person can offer qaḍā prayer on his behalf, even though he himself may be unable to offer them. However, there is no problem in offering qaḍā prayer on his behalf after his death.
Issue No.976- It is haram to perform sajdah for anyone other than the Almighty Allah. Some people place their foreheads on earth before the graves of the holy Imams (as). If this is done to prostrate for the Imam (as), it is haram and if it is to thank Allah, there is no problem in it. However, if this is considered by the others as sajdah for the holy Imams (as), or if it gives a pretext to the enemies, then it is not allowed as an obligatory precaution.
Issue No.957- If a person performs sajdah in an unusual manner, e.g., if he lies and places the seven limbs on the ground, his sajdah is void.
Issue No.967- It is permissible to perform sajdah on grass, hay, etc., which grow from earth and are served as fodder for animals, and also on flowers which are not edible by human beings. However, sajdah on flowers and herbs, which are medicinal, such as violet flowers and borage is not permissible, as an obligatory precaution. The same rule also applies to flowers that are edible in some cities, but are not edible in other cities.
Issue No.969- It is permissible to perform sajdah on all types of paper.
Issue No.963- If the ground on which a person wants to perform sajdah is muddy and his body and his clothes will become dirty if he performs sajdah, he can perform his prayer in a standing posture and indicate for sajdah with his head.
Issue No.962- It is not permissible, as an obligatory precaution, to perform sajdah on an object on which the body does not stay still. However, as we have mentioned earlier, if one can perform the obligatory parts of the prayer in a moving ship or train, etc., his prayer is correct. There is no harm in performing sajdah on a mattress or similar things where the body is not still at first but becomes so later.
Issue No.968- It is permissible to perform sajdah on limestone and gypsum before or after they are baked, and it is also permissible to perform sajdah on brick, earthenware and cement.
Issue No.966- The obligatory precaution is that sajdah should not be performed on the leaves of grapevine, which some people use in food.
Issue No.658- A person whose obligation is tayammum should not perform tayammum before the time for prayer sets in. However, if he performs tayammum for some other obligatory or mustaḥab acts and his excuse continues until the prayer time, he can offer his prayer with that tayammum.
