The Quran

إِنَّ الَّذينَ يَرمونَ المُحصَناتِ الغافِلاتِ المُؤمِناتِ لُعِنوا فِي الدُّنيا وَالآخِرَةِ وَلَهُم عَذابٌ عَظيمٌ

Muhammad Asad

[But,] verily, those who [falsely, and without repentance,¹] accuse chaste women who may have been unthinkingly careless but have remained true to their faith,² shall be rejected [from God's grace] in this world as well as in the life to come: and awesome suffering awaits them

According to Razi, the absence of repentance is incontrovertibly implied in the condemnation expressed in the sequence, since the Qur'an makes it clear in many places that God always accepts a sinner's sincere repentance.
Lit., "chaste, unmindful [or "careless"] believing women", i.e., virtuous women who thoughtlessly expose themselves to situations on which a slanderous construction may be put.