16:126
An-Nahl 126
Surah An-Nahl (النحل), verse 126 — reference 16:126. Arabic text with optional translation and free audio on Al-Qalam.
وَإِنْ عَاقَبْتُمْ فَعَاقِبُوا۟ بِمِثْلِ مَا عُوقِبْتُم بِهِۦ ۖ وَلَئِن صَبَرْتُمْ لَهُوَ خَيْرٌ لِّلصَّـٰبِرِينَ
wa-in ʿāqabtum faʿāqibū bimith'li mā ʿūqib'tum bihi wala-in ṣabartum lahuwa khayrun lilṣṣābirīna
And if you punish [an enemy, O believers], punish with an equivalent of that with which you were harmed. But if you are patient - it is better for those who are patient.