“About the case of a man who marries a woman for an appointed time that if within that time he pays mahr (dower) she is his wife and if he does not pay mahr (dower) within the appointed time he will have no way to the woman because such is their condition of the time of forming marriage, abu Ja’far ‘Alayhi al-Salam, has said, ‘He has his wife in his hand and their condition falls void.’”