This is a ‘Madani’ surah and it has 29 ayat.
The Holy Prophet (s.a.w.) said that the reciter of this surah will be counted from among the staunch believers.
Imam Muhammad al-Baqir (a.s.) has said that whoever recites all the surahs that start with Tasbih of Allah (s.w.t.) before going to sleep, will not die before meeting the 12th Holy Imam (a.s.) and after his death, he will have the honor of being a neighbor of the Holy Prophet (s.a.w.).
It is narrated from Imam Ja’far as-Sadiq that if surah al-Hadid and al-Mujadilah are recited in the faraa’idh (compulsory prayers) frequently, then the reciter will never face any punishment of Allah (s.w.t.) in this world and will not see any evil from his family.
If recited by a prisoner, he will be released soon. If worn on the neck as a talisman, the wearer will not be killed in war. This surah also makes one courageous.