Surat Al-Mā'idah - سورة المائدة

إِلَّا الَّذِينَ تَابُوا مِن قَبْلِ أَن تَقْدِرُوا عَلَيْهِمْ ۖ فَاعْلَمُوا أَنَّ اللَّهَ غَفُورٌ رَّحِيمٌ

Muhsin Khan: Except for those who (having fled away and then) came back (as Muslims) with repentance before they fall into your power; in that case, know that Allah is Oft-Forgiving, Most Merciful.