Al-Ahzab - 33:70

يَا أَيُّهَا الَّذِينَ آمَنُوا اتَّقُوا اللَّهَ وَقُولُوا قَوْلًا سَدِيدًا
[33:70]
O you who believe! be careful of(your duty to) Allah and speak the right word,
O ye who believe! Fear Allah, and (always) say a word directed to the Right:
O ye who believe! Guard your duty to Allah, and speak words straight to the point;