9. A number of our people have narrated from Sahl ibn Ziyad and Ali ibn Ibrahim has narrated from his father from all Ahmad ibn Muhammad from ibn abu Nasr from Ahmad ibn al-Mubarak from al-Husayn ibn Ahmad al-Minqariy who has said the following: “Abu ‘ Abd Allah , has said, ‘The Sunnah about lime paste is to apply it after every fifteen days. If it becomes twenty days but you do not have it, you must borrow on the account of Allah.’”