Question: Could you please give us the legal ruling regarding some Muslims who take oaths in the name of Allaah to respect man-made laws, even though these laws contradict the Sharee‘ah (Islaamic law)?Is this among the forbidden acts? As the policy of some legislative councils stipulates that a member must take such an oath when they are appointed to an official position. Please, explain the legal ruling on this?
Answer: It is impermissible without taking an oath; how will it be, then, when one takes an oath by Allaah to do so! No doubt, the sin will be greater with an oath taken… read more here.