As-Sahifa al-Sajjadiyya, a book containing 54 supplications and monologues of Imam al-Sajjad (PBUH), the fourth imam of the Ahl al-Bayt, peace be upon them, and enjoys great prestige among the Shiites.
It comes in the third rank after the Noble Qur’an and Nahj al-Balaghah, and it is known as “Zabour Al-Muhammad” and “The Injil of Ahl al-Bayt (PBUH)”, and the sister of the Qur’an.
Imam Al-Sajjad explained in the folds of his prayers a lot of knowledge, including: knowledge of God, knowledge of the universe, knowledge of man, the unseen world, the angels, the message of the prophets, the position of the prophets and Ahl al-Bayt (PBUH), the imamate, moral virtues, social and economic matters, and historical references, And the grace of God, the etiquette of supplication, the recitation of the Qur’an, prayer, and other religious knowledge. The most famous of the newspaper's supplications is the supplication of honorable morals.

In addition to its status among the Shiites, some Sunni scholars have praised the book's eloquence and eloquence as well.

Al-Agha Buzurg al-Tehrani mentions nearly 50 commentaries on al-Sahifah in al-Dari’ah
Among the most famous: Riyad Al-Salkin, written by Ibn Masum Al-Madani.
The newspaper has been translated into several languages, including Persian, English, French, Turkish, Spanish, Urdu and other languages.

For the first time, Al-Mutawakkil bin Harun Al-Balkhi, who is one of the companions and narrators of Imam Al-Sadiq (PBUH), when he met Yahya bin Zaid, received a copy of the newspaper, then met him with a copy of Imam Al-Baqir (PBUH), and that was when he met the sixth imam, and he narrated the text of the newspaper, and then his son Omar or Umair taught it to the narrators after him