The Thirteenth Night Prayer: Four units with Surah al-Fātiḥah once and Surah al-Tawḥīd twenty-five times.
The Thirteenth Day Supplication
اَللّٰهُمَّ طَهِّرْنِي فِيْهِ مِنَ الدَّنَسِ وَ الْاَقْذَارِ
allahumma tahhirny fihi mina alddanasi wal-aqdhari
O Allah: on this day, (please) purify me against filth and dirt;
وَ صَبِّرْنِي فِيْهِ عَلَى كَائِنَاتِ الْاَقْدَارِ
wa sabbirny fihi `ala ka’inati alaqdari
And grant me on this day steadfastness against vicissitude of time,
وَ وَفِّقْنِي فِيْهِ لِلتُّقَى وَ صُحْبَةِ الْاَبْرَارِ
wa waffiqny fihi lilttqa wa suhbati alabrari
And lead me on this day to piety and companionship of the upright ones;
بِعَوْنِكَ يَا قُرَّةَ عَيْنِ الْمَسَاكِينِ
bi`awnika ya qurrata `ayni almasakini
By Your assistance; O the delight of the poor ones.
Night of 13 Ramaḍān