伊斯兰国内部安全部门负责监管与国家内部安全相关的一切事务，并为此动用军事力量。

The department of Internal Security oversees everything connected with security inside the Islamic State, utilising the military forces for this purpose.

内部安全与外部安全一样，都由军队来维护。警察的职能受军队的控制。先知（愿主福安之）任命盖斯·本·萨阿德为安全负责人，在他出席议会时负责保护先知ﷺ。内部安全部队应当遵循正规军队的程序，以便保持其组织有序、高效协调，如同正规军队一样。内部安全部队的职能是监视、维护法律与秩序，并执行国家颁布的法律。先知ﷺ任命阿卜杜拉·本·麦斯欧德为监视（assas）的负责人。军队这一部分进行的监视并不意味着侵犯他人的隐私，而是用于一般性的监督。由于维护内部安全是国家的责任，国家无权为履行这一职能而向本国公民征收费用。

The internal security, as well as the external security, is preserved by the army. The functions of the (police) are under the control of the army. The Prophet (saw) appointed Qays ibn Sa‘ad as the head of security. He was there to protect the Prophet (saw) when he was in Majlis. It is preferable for the internal security force to maintain the procedures of the regular army, so that it will remain organised, efficient, and co-ordinated as in a regular army. The internal security force has the function of surveillance, preserving law and order, and to execute the laws adopted by the State. The Prophet (saw) appointed ‘Abdullah ibn Mas‘ud as the leader of assas (surveillance). Surveillance, by this part of the army, does not mean to invade the privacy of others. Rather, its usage is for general surveillance. Since maintaining the internal security is an action the State is responsible for, it has no right to levy payments on the citizens of the State for executing this function.