Is it obligatory to repeat past prayers if ghusl al-janabah did not include washing the neck separately and running fingers through the sides of the hair near the ears for eight years, knowing that the head was washed and the rest of the hair was massaged?

If water covers the neck during ghusl, it is not a condition to rub it or dedicate a separate washing for it, as this is not a condition for the validity of ghusl according to the more preponderant opinion. However, if the water does not penetrate all of the hair and reach its roots, then the ghusl is invalid, because it is obligatory to make the water reach the roots of the hair and the skin beneath it. The prayers from this period must be made up.

However, if it is highly probable that water reached all the roots of the hair, then the ghusl is valid and no make-up is required, as An-Nawawi said: "The intention and the pouring of water over the entire body, including its hair and skin, are obligatory without dispute. Whether the hair on the skin is sparse or dense, it is obligatory to make the water reach all of it and all the skin beneath it, without dispute."

Most scholars say that running water through the beard is obligatory in ghusl from janabah, but not in wudu'.

If the questioner began praying after reaching puberty, he must repent for his negligence in fulfilling the obligatory duties during the period following puberty in which he did not perform the prayers. The majority of jurists hold that it is obligatory to make up missed prayers and fasts.