7. Ali ibn Muhammad has narrated from Sahl ibn Ziyad from Muhammad ibn al-Husayn ibn Shammun from ‘Abd Allah ibn ‘Abd al- Rahman from Misma’ abu Sayyar who has said the following: “Abu ‘Abd Allah , has said, “The Messenger of Allah has prohibited speaking jargon language in Masjid (expressions understood by two people or a group only).’”