- If an unknown liquid falls on a person, there is no need to ask about it or to wash one's clothes.
- If a person finds something moist on his or her body or clothes at night and does not know what it is, he or she does not need to smell it in order to identify it.
- Clothes that have street mud on them do not have to be washed.
- If a person finishes praying and sees some previously unseen impurity on his or her clothes or body, or was aware of but forgot about them, his or her prayer does not have to be repeated.
- If a person cannot determine what part of his or her clothes contains the impurity, the whole garment should be washed, for "if an obligation can be fulfilled only by performing another related act, that act also becomes obligatory."
- If a person mixes pure clothes with impure clothes (and cannot tell them apart), he or she should investigate the matter and pray once in one of the clothes.
- It is not proper to carry something that has God's Name upon it while going to the bathroom, unless he or she is afraid of losing it or having it stolen.
- One should not talk in the bathroom, respond to a greeting, or repeat what the muezzin is saying. One may speak if there is some necessity. In the event of sneezing, one should praise God silently by moving his or her lips.
- One should neither face nor turn his or her back on the qibla while answering a call of nature, especially if in an open area.
- One should seek a soft and low piece of ground to protect against any impurity. The Prophet said: "When one of you urinates, he should choose the proper place to do so."
- One should avoid shaded places and places where people walk and gather.
- One should not answer a call of nature in bathing places or in still or running water.
- One should not urinate while standing, though some allow it.
- One must remove any impurities from one's clothes and body after relieving oneself.
- One should not clean himself or herself with the right hand.
- One should remove any bad smell from one's hands after answering a call of nature.
- One should enter the bathroom with the left foot, saying: "I seek refuge in God from noxious male and female beings (devils)," and exit with one's right foot, saying: "O God, I seek your forgiveness."
- After a man has relieved himself, he should wait until the urine stops completely and make sure that none of it has fall en onto his clothes. This is called istibra (seeking full purification). Ibn 'Abbas related that the Messenger of God, upon him be God's blessings and peace, passed by two graves and said: "They are being punished, but not for a great matter (on their part). One of them did not clean himself from urine, and the other used to spread slander." (Tirmidhi, "Tahara," 53) To erase all doubt, the person should sprinkle his penis and underwear with water.