Does the ghusl of a previously married woman (thayyib) differ from that of a virgin (bikr)? And is it obligatory to make the water reach the small amount that appears when a previously married woman sits on her heels? And if she did not do that previously, does her ghusl become invalid?

Scholars have differed regarding the extent a woman must wash of her private parts when performing ghusl (definition) for janabah (definition) (ritual impurity) or menstruation. The Hanbalis believe it is obligatory to wash what becomes visible when she squats, without distinguishing between a virgin and a non-virgin. The Malikis and Shafi'is, however, differentiate between them: a non-virgin washes what becomes visible from her private parts when sitting, while a virgin washes what is below the hymen. It has been narrated from Imam Ahmad that it is not obligatory to wash what appears when she squats, as it is considered internal. The apparent (ruling) is that if a woman performs ghusl without difficulty in washing that, it suffices her. However, if she takes precautions and washes as much as she can without hardship, that is better.