The first: cases in which water must reach beneath the beard, whether it is thick or thin. This applies to the major purification following ritual impurity due to sexual discharge, based on the hadith of Aishah: “The Prophet ﷺ would pour water over his head until, when he thought that he had moistened his skin, he would pour water over it three times.” (1) And the hadith: “Wash the hair and cleanse the skin.” (2)
The second: cases in which water need not reach beneath the hair, whether it is thin or thick. This applies to purification by dry ablution.
The third: cases in which water must reach beneath the beard if it is thin, but need not do so if it is thick. This applies to ablution.
If a person has no beard, then passing the fingers through it does not apply.
Does the same apply to a bald person, who has no hair on his head, with regard to shaving or shortening the hair during the rites of pilgrimage?
Some scholars have said that it is recommended for him to pass a razor over his head. (3)
In reality, this is of no benefit, because passing a razor over