Al-Mujadilah - 58:9

يَا أَيُّهَا الَّذِينَ آمَنُوا إِذَا تَنَاجَيْتُمْ فَلَا تَتَنَاجَوْا بِالْإِثْمِ وَالْعُدْوَانِ وَمَعْصِيَتِ الرَّسُولِ وَتَنَاجَوْا بِالْبِرِّ وَالتَّقْوَى وَاتَّقُوا اللَّهَ الَّذِي إِلَيْهِ تُحْشَرُونَ
[58:9]
O you who believe! when you confer together in private, do not give to each other counsel of sin and revolt and disobedience to the Messenger, and give to each other counsel of goodness and guarding (against evil); and be careful of (your duty to) Allah, to Whom you shall be gathered together.
O ye who believe! When ye hold secret counsel, do it not for iniquity and hostility, and disobedience to the Prophet; but do it for righteousness and self-restraint; and fear Allah, to Whom ye shall be brought back.
O ye who believe! When ye conspire together, conspire not together for crime and wrongdoing and disobedience toward the messenger, but conspire together for righteousness and piety, and keep your duty toward Allah, unto whom ye will be gathered.