Dua to be recited on the twenty third day of Ramadhan

اللَّهُمَّ اغْسِلْنِي فِيهِ مِنَ الذُّنُوبِ وَ طَهِّرْنِي فِيهِ مِنَ الْعُيُوبِ وَ امْتَحِنْ قَلْبِي فِيهِ بِتَقْوَى الْقُلُوبِ يَا مُقِيلَ عَثَرَاتِ الْمُذْنِبِينَ

O Allah, on this day, wash away my sins, purify me from all flaws, examine my heart with (for) the piety of the hearts, O One who overlooks the shortcomings of the sinners.