2. Muhammad ibn Yahya has narrated from Ahmad ibn Muhammad ibn ‘Isa from al-Husayn ibn Sa‘id from al-Nadr ibn Suwayd from al-Qasim ibn Sulayman from ‘Ubayd ibn Zurarah who has narrated the following: “About the case of a man who brings a complaint against another but does not have testimony, abu ‘Abd Allah عليه السلام, has said, ‘He must ask him (defendant) to take an oath, and if he turns the oath on the plaintiff who does not take the oath, then he has no right.’”