مسائل المنتخبه (Articles Of Islamic Acts) - الخوئي، السيد أبوالقاسم - الصفحة ٧٨ - BATH FOR CEREMONIAL UNCLEANNESS (JANABAT)

intends to perform obligatory bath, but comes to know after performing the bath that it has beenperformed before the time for prayers had set in, the bath would be in order.
٣٦٦. There are two methods of performing ceremonial bath, whether the bath be obligatory or recommended: (i) Sequence Bath (Ghusl tartibi) and (ii) Immersion bath(Ghusl e].
 
SEQUENCE BATH (GHUSL TARTIBI)
٣٦٧. In sequence bath a person should fîst intend to take a bath. Thereafter he should fîst wash his head and then his neck and thereafter the remaining parts ofhis body and it u better that he should wash the right part of his body first and the left part afterwards And in case he only moves each one of these parts under the waterwith the intention of ceremonial bath (Ghusl), it is difficult to consider sequence bath having been performed properly and the precaution is that one should not contentoneself with it. And in case the person concerned washes his body before washing his head, either intentionally, or on account of forgetfulness or. because of not knowing therule, his bath is void.
٣٦٨. If the person concerned washed his body before his head it is not necessary for him to repeat the bath. On the other hand if he washes his body again beforehappening of any such thing, which invalidates his bath, his bath will be in order.
٣٦٩. In order to ensure that both the parts(head and neck; and remaining part of the body have been washed properly one should, while washing a part, also includesome portion of the other part with it.
٣٧٠. If after taking the bath the person concerned realizes that he has not washed some part of the body but does not know which part of the body it is, it is notnecessary to wash the head again and only those places should be washed about which there is a possibility that they have not been washed.