The Holy Prophet (s.a.w.s.) taught this Namaz to Hazrat Ja’far Tayyar, the brother of Ameerul Momineen Ali (a.s.).
To seek forgiveness of sins, and to beseech Allah for fulfillment of any legitimate desire this Namaz is prayed.
The best time to pray this Namaz is between Sunrise and Zuhr, on Friday; if not possible, choose any suitable time.
It is a four rakat Namaz, divided into two parts. Pray each part exactly like the Fajr Namaz, with the following adjustments:
(i) First rakat After recitation of Suratul Faatihah, recite Suratuz Zilzaal
إِذَا زُلْزِلَتِ الْأَرْضُ زِلْزَالَهَا. وَأَخْرَجَتِ الْأَرْضُ أَثْقَالَهَا. وَقَالَ الْإِنْسَانُ مَا لَهَا. يَوْمَئِذٍ تُحَدِّثُ أَخْبَارَهَا. بِأَنَّ رَبَّكَ أَوْحَىٰ لَهَا. يَوْمَئِذٍ يَصْدُرُ النَّاسُ أَشْتَاتًا لِيُرَوْا أَعْمَالَهُمْ. فَمَنْ يَعْمَلْ مِثْقَالَ ذَرَّةٍ خَيْرًا يَرَهُ. وَمَنْ يَعْمَلْ مِثْقَالَ ذَرَّةٍ شَرًّا يَرَهُ
(ii) Second rakat After recitation of Suratul Faatihah, recite Suratul Aadiyaat
وَالْعَادِيَاتِ ضَبْحًا. فَالْمُورِيَاتِ قَدْحًا. فَالْمُغِيرَاتِ صُبْحًا. فَأَثَرْنَ بِهِ نَقْعًا. فَوَسَطْنَ بِهِ جَمْعًا. إِنَّ الْإِنْسَانَ لِرَبِّهِ لَكَنُودٌ. وَإِنَّهُ عَلَىٰ ذَٰلِكَ لَشَهِيدٌ. وَإِنَّهُ لِحُبِّ الْخَيْرِ لَشَدِيدٌ. أَفَلَا يَعْلَمُ إِذَا بُعْثِرَ مَا فِي الْقُبُورِ
(iii) Third Rakat After recitation of Suratul Faatihah, recite Suratun Nasr
إِذَا جَاءَ نَصْرُ اللَّـهِ وَالْفَتْحُ. وَرَأَيْتَ النَّاسَ يَدْخُلُونَ فِي دِينِ اللَّـهِ أَفْوَاجًا. فَسَبِّحْ بِحَمْدِ رَبِّكَ وَاسْتَغْفِرْهُ إِنَّهُ كَانَ تَوَّابًا
(iv) Fourth Rakat after recitation of Suratul Faatihah, recite Suratul Ikhlaas.
قُلْ هُوَ اللَّهُ أَحَدٌ. اللَّهُ الصَّمَدُ. لَمْ يَلِدْ وَلَمْ يُولَدْ. وَلَمْ يَكُن لَّهُ كُفُوًا أَحَدٌ
(if you have not learned any by heart the second surah of each rakat, recite suratul Ikhlaas in all 4 rakats).
In each rakat recite Tasbeehaatul Arbaa
Subhaanallaahi wal hamdu lillaahi wa laa ilaaha illallaahu wallaahu Akbar.
سبحان الله والحمد لله ولا إله إلا الله والله أكبر
(i) After reciation of Surahs… 15 times
(ii) In Rukoo… 10 times
(iii) In Qiyyaam after Rukoo… 10 times
(iv) In the First Sajdah… 10 times
(v) While sitting after First Sajdah… 10 times
(vi) In the second Sajdah… 10 times
(vii) While sitting after second Sajdah… 10 times.
In this manner Tasbeehaatul Arbaa are recited 75 times in each rakat and 300 times in four rakats.
In case of old age or weakness you can recite Tasbeehaatul arbaa 300 times at the end of Namaz, according to your convenience, while sitting, lying or standing.
According to Imam Jafar Sadiq (a.s.), the following Dua is to be recited, in the last Sajdah of the fourth Rakat.
سُبْحَانَ مَنْ لَبِسَ ٱلْعِزَّ وَٱلْوَقَارَ سُبْحَانَ مَنْ تَعَطَّفَ بِٱلْمَجْدِ وَتَكَرَّمَ بِهِ سُبْحَانَ مَنْ لاَ يَنْبَغِي ٱلتَّسْبِيحُ إِلاَّ لَهُ سُبْحَانَ مَنْ اَحْصَىٰ كُلَّ شَيْءٍ عِلْمُهُ سُبْحَانَ ذِي ٱلْمَنِّ وَٱلنِّعَمِ سُبْحَانَ ذِي ٱلْقُدْرَةِ وَٱلْكَرَمِ اَللَّهُمَّ إِنِّي اَسْئَلُكَ بِمَعَاقِدِ ٱلْعِزِّ مِنْ عَرْشِكَ وَمُنْتَهَىٰ ٱلرَّحْمَةِ مِنْ كِتَابِكَ وَٱسْمِكَ ٱلاَعْظَمِ وَكَلِمَاتِكَ ٱلتَّامَّةِ ٱلَّتِي تَمَّتْ صِدْقاً وَعَدْلاًَ صَلِّ عَلَىٰ مُحَمَّدٍ وَاَهْلِ بَيْتِهِ