The status of Mafatih al-Jinan in the Shia world
WikiShia.net:
Mafātīḥ al-jinān (Arabic: مفاتیح الجنان, keys to the heavens) by Shaykh ‘Abbas Qommi is the most popular book of supplication in the Shi’a world. It contains du’as, supplications, Ziyarahs, practices specific to certain days, months, and occasions, religious practices and manners, as well as some anecdotes narrated from the Prophet (s), Imams (a), and Islamic scholars.
Before the introduction of Mafatih al-jinan, other du’a books were used by the Shi’ites. The author of Mafatih al-jinan has included content from other books including Iqbal al-a’mal by al-Sayyid b. Tawus, Misbah by al-Kaf’ami, and Zad al-ma’ad by al-‘Allama al-Majlisi.
Mafatih al-jinan was very well received soon after it was published. Nowadays, it can be found in almost all houses, The Iranian ‘Ayatollah’ ‘Abbas Qommi (b. 1294/1877 – d. 1359/1940) who openly believed in the distortion of the Qur’an and from whom Shias take their religion, included an entire chapter in his Mafatih al-Jinan (most revered Shia book of du’a) that instructs Shiites to perform various religious rituals on the holy and blessed (!) day of Nowruz.mosques, and Islamic centers.
Reference: http://en.wikishia.net/view/Mafatih_al-jinan_(book)
Index of Mafatih al-Jahim (‘al-Jinan’): Translation (highlighted yellow part):
The virtue of the day of Nowruz and the recommended religious rituals on that day and on the Roman months.
Translation of the red-marked part:
Qommi’s promise to Shias at the end of this chapter:
يغفر لك ذنوب خمسين سنة
“Your sins of fifty years will be forgiven”
Comment:
…he [‘Ayatollah’ Makarem Shirazi] states that this day (i.e. Nowruz) has Islamic significance, which we need to ensure is marked in an Islamic fashion.
Reference:http://www.duas.org/nawroz.htm#collapse5