Quran 8:70

يَـٰٓأَيُّہَا ٱلنَّبِىُّ قُل لِّمَن فِىٓ أَيۡدِيكُم مِّنَ ٱلۡأَسۡرَىٰٓ إِن يَعۡلَمِ ٱللَّهُ فِى قُلُوبِكُمۡ خَيۡرً۬ا يُؤۡتِكُمۡ خَيۡرً۬ا مِّمَّآ أُخِذَ مِنڪُمۡ وَيَغۡفِرۡ لَكُمۡ‌ۗ وَٱللَّهُ غَفُورٌ۬ رَّحِيمٌ۬ ٧٠

O you prophet, tell the prisoners of war in your hands, "If ALLAH knew of anything good in your hearts, He would have given you better than anything you have lost, and would have forgiven you. ALLAH is Forgiver, Most Merciful."