Surah Al-Isra, ayah 36

17:36

وَلَا تَقۡفُ مَا لَيۡسَ لَكَ بِهِۦ عِلۡمٌۚ إِنَّ ٱلسَّمۡعَ وَٱلۡبَصَرَ وَٱلۡفُؤَادَ كُلُّ أُوْلَٰٓئِكَ كَانَ عَنۡهُ مَسۡـُٔولٗا ٣٦

Walā taqfu mā laysa laka bihī 'ilmun innas-sam'a wal-basara wal-fu'āda kullu ulā'ika kāna 'anhu mas'ūlā

And do not pursue745 that of which you have no knowledge. Indeed, the hearing, the sight and the heart - about all those [one] will be questioned.

Footnotes

745 i.e., do not assume and do not say.