اَللَّهُمَّ اغْفِرْ ذَۢنْبِي وَطَهِّرْ قَلْبِي، وَحَصِّنْ فَرْجِي

Allaahummaghfir dham-bee wa tah-hir qalbee, wa hassin far-jee

O Allah forgive my sin, cleanse my heart and guard my chastity.

Reference: Sahih (Albani). Musnad Ahmad: 22265