سُورَةُ الأَنفَالِ
Surah Al-Anfaal·8:67
مَا كَانَ لِنَبِيٍّ أَنْ يَكُونَ لَهُ أَسْرَىٰ حَتَّىٰ يُثْخِنَ فِي الْأَرْضِ ۚ تُرِيدُونَ عَرَضَ الدُّنْيَا وَاللَّهُ يُرِيدُ الْآخِرَةَ ۗ وَاللَّهُ عَزِيزٌ حَكِيمٌ٦٧
IT DOES NOT behove a prophet to keep captives unless he has battled strenuously on earth. You may desire the fleeting gains of this world-but God desires [for you the good of] the life to come: and God is almighty, wise.