Do not speak without Knowledge

`Ali bin Abi Talhah reported that Ibn `Abbas said: "This means) do not say (anything of which you have no knowledge)." Al-`Awfi said: "Do not accuse anyone of that of which you have no knowledge." Muhammad bin Al-Hanafiyyah said: "It means bearing false witness." Qatadah said: "Do not say, `I have seen', when you did not see anything, or `I have heard', when you did not hear anything, or `I know', when you do not know, for Allah will ask you about all of that." In conclusion, what they said means that Allah forbids speaking without knowledge and only on the basis of suspicion, which is mere imagination and illusions. As Allah says:

اجْتَنِبُواْ كَثِيراً مِّنَ الظَّنِّ إِنَّ بَعْضَ الظَّنِّ إِثْمٌ

Commentary

Two injunctions in these verses, the twelfth and the thirteenth, relate to mores of common social living. The twelfth injunction forbids doing something without having become certain about it.