How A Sick Person Can Perform The Act Of Purification
1. It is obligatory on the sick person to purify himself with water, that is to perform Wudu for the minor ritual impurity (passing wind or urine or answering the call of nature) and to perform a Ghusl for the major ritual impurity (sexual discharge).
2. If he is unable to use water for purification due to his weakness or he fears that the illness will get worse as a result, or that his recovery will be delayed, then he must perform Tayammum.
3. How to perform Tayammum: Strike clean earth with both hands one time, then wipe your whole face and wipe your hands, one over the other, leaving no part unwiped.
4. If he is unable to perform the purification act by himself, someone should help him perform Wudu or Tayammum.
5. If he has a wound on one of his limbs (which are washed for the purification act) he should wash it with water. If washing with water affects him (adversely) then he can wipe over the affected area with his wet hand. If wiping also affects him, then he should perform Tayammum.
6. If he has a bandage or cast over some portion of his limbs, he should wipe over it with a wet hand in place of washing the limb and he doesn’t need to perform Tayammum since the wiping took the place of washing.
7. It is permissible to perform Tayammum on a wall or any clean place that has dust on it. If the wall has been covered by paint or some other substance that is not of the category of earthy substance, it shouldn’t be used for Tayammum unless there is a coating of dust on it.
8. If Tayammum can’t be easily performed on the face of the earth or a wall or other object having a dusty surface, there is no harm in putting some clean dirt in a container or a handkerchief, etc. and performing Tayammum on it.
9. If he performed Tayammum for one Salat, then kept in that state until the next Salat comes in, he can pray with the first Tayammum , and doesn’t need to perform a new Tayammum, because he is still in a state of purification and nothing occurred to cause its nullification.
10. It is obligatory for the sick person to clean his body of physical filth. If he is unable, he should go ahead and pray as he is, his Salat is valid, and he doesn’t have to repeat the Salat later.
11. It is obligatory for the sick person to pray in clean clothes. If physical filth gets on his clothes, he must wash it off or change into clean clothes. If he is unable to, he should go ahead and pray as he is, his salat is valid, and he doesn’t have to repeat the Salat later.
12. It is obligatory for the sick person to pray on something clean, if the place becomes impure, washing it clean is obligatory or replacing it with something clean, or putting something clean over it. If he is unable, he should go ahead and pray as he is, his Salat is valid, and he doesn’t have to repeat later.
13. It is not permitted for the sick person to postpone Salat from its time because he is too weak to purify himself, rather he should purify himself as much as he is able to do, and perform the Salat in time, even if there is some filth on his body or clothes or his place which he is incapable to clean away.