Which of the following is NOT one of the 11 obligations (Fara'id) of Ghusl listed in Noor-ul-Idah?

Obligatory Bath (الغسل): Obligations

• Inside the navel (Surrah).
• Wiping the back of the neck (Mas'h al-Raqabah).
• The skin underneath the beard.
• The outer female private parts (Al-farj al-kharij).