O you who believe! Act in reverence for God and piously, without doing anything to incur His punishment, and always speak words true, proper and straight to the point
O believers! Protect yourselves from Allah (His system by which He will enforce upon you the consequences of your deeds) and speak the solid truth!
Sayyed Abbas Sadr-Ameli
O' you who believe! Be in awe of Allah and speak you the right word
Al-muntakhab fi tafsir al-Qur'an al-Karim
O you who have conformed to Islam: Fear Allah and entertain the profound reverence dutiful to Him. When you express your thoughts in words and when you make a statement or a declaration, do see that your words are a disclosure of facts, apposite, appropriate, relevant and to the point