Idara ya Usalama wa Ndani inasimamia kila jambo linalohusiana na usalama ndani ya Dola ya Kiislamu, ikitumia vikosi vya kijeshi kwa madhumuni hayo.

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

Usalama wa ndani, pamoja na usalama wa nje, unalindwa na jeshi. Kazi za (polisi) ziko chini ya udhibiti wa jeshi. Mtume ﷺ alimteua Qays ibn Sa‘ad kuwa mkuu wa usalama. Alikuwepo kumlinda Mtume ﷺ alipokuwa katika majlis. Inafaa kwa kikosi cha usalama wa ndani kufuata taratibu za jeshi la kawaida, ili kibaki kimepangika, chenye ufanisi, na kilichoratibiwa kama jeshi la kawaida. Kikosi cha usalama wa ndani kina kazi ya uchunguzi, kuhifadhi sheria na utulivu, na kutekeleza sheria zilizopitishwa na Dola. Mtume ﷺ alimteua ‘Abdullah ibn Mas‘ud kuwa kiongozi wa assas (uchunguzi). Uchunguzi wa sehemu hii ya jeshi hauna maana ya kuingilia faragha ya watu wengine. Badala yake, matumizi yake ni kwa uchunguzi wa jumla. Kwa kuwa kudumisha usalama wa ndani ni jukumu ambalo Dola inalibeba, Dola haina haki ya kutoza malipo kwa raia wa Dola kwa ajili ya kutekeleza kazi hii.

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.