fa'innahu la yaghfiru aldhdhunuba kullaha jami`an illa anta
for none can forgive all sins save You.
You may then offer the Sunset supererogatory (Nafilah) prayer, which consists of four units of prayer, each two separated by a Taslim statement. You should not utter any word between the two parts of the prayer.
According to the Shaykh, it has been narrated that Surah al-Kafirun (No. 109) should be recited in the first unit and Surah al-Tawhid in the second. In the third and fourth units, it is optional to recite any other Surah desired.
It has been also narrated that Imam `Ali al-Naqi (al-Hadi) (peace be upon him) used to recite, in the third unit (Rak`ah) of this prayer, Surah al-Fatihah and the first six verses (Ayahs) of Surah al-Hadid, and in the fourth unit, Surah al-Fatihah and the last four verses of Surah al-Hashr.
It is also recommended to repeat the following supplicatory prayer seven times in the last prostration (sajdah) of all supererogatory prayers each night, especially at Friday nights (i.e. the night before Friday):
wa la tu`annini bitalbi ma lam tuqaddiru li fihi rizqan
Please, do not fatigue me by seeking that which You have not decided for me to take,
فَإِنَّكَ غَنِيٌّ عَنْ عَذَابِي
fa'innaka ghaniyyun `an `adhabi
because You are certainly in no need for tormenting me
وَ أَنَا فَقِيـرٌ إِلَىٰ رَحْمَتِكَ
wa ana faqirun ila rahmatika
while I am in full need for Your mercy.
فَصَلِّ عَلَىٰ مُحَمَّدٍ وَآلِهِ
fasalli `ala muhammadin wa alihi
(Please) Send blessings upon Muhammad and his Household
وَجُدْ عَلَىٰ عَبْدِكَ بِفَضْلِكَ
wa jud `ala `abdika bifadlika
and confer liberally upon me, Your slave, out of Your graciousness.
إِنَّكَ ذُو فَضْلٍ عَظيم
innaka dhu fadlin `azimin
You are surely the Lord of great favor.
Upon accomplishment of the Evening Prayer, it is recommended to recite Surah al-Qadr (No. 97) seven times. It has been reported from Imam Mohammed Baqir (peace be upon him), that one who does so will be in the guarantee (security) of Allah (swt) until the morning.
.Imam Mohammed Taqi (a.s.) has said that one who recites the Sura Qadr 7 times .after the mandatory maghribain prayers, he will remain in the care of Allah till the morning. then say:.
wa min sharri shshayatini aljinn wal-insi fasallimni
and keep me sound from the evil of the devils of jinn and men,
يَا رَبَّ ٱلْعَالَمِينَ
ya rabba al`alamina
O Lord of the Worlds,
وَصَلِّ عَلَىٰ مُحَمَّدٍ وَآلِهِ
wa salli `ala muhammadin wa alihi
and bless Muhammad and his Household.
The Wutayrah Prayer
The Wutayrah supererogatory prayer, which consists of two units and should be offered in the position of sitting by reciting one hundred verses of the Holy Qur'an in both the units. Hence, it is recommended to recite Surah al-Waqi`ah (No. 56) in the first unit and Surah al-Tawhid in the second.