4. Muhammad ibn Yahya has narrated from Muhammad ibn Ahmad from Muhammad ibn ‘Abd al-Hamid from abu Jamilah from al- Hassan ibn Ziyad who has said the following: “Abu ‘Abd Allah عليه السلام, has said, ‘When a man goes to bed with his wife then she asks for her mahr (dower) and he says that he has paid, he must present testimony and take an oath.’”