Surah Al-Isra — Ayah 36 (17:36)
وَلَا تَقۡفُ مَا لَيۡسَ لَكَ بِهِۦ عِلۡمٌۚ إِنَّ ٱلسَّمۡعَ وَٱلۡبَصَرَ وَٱلۡفُؤَادَ كُلُّ أُوْلَٰٓئِكَ كَانَ عَنۡهُ مَسۡـُٔولٗا ٣٦
English translation (Saheeh International)
And do not pursue1 that of which you have no knowledge. Indeed, the hearing, the sight and the heart - about all those [one] will be questioned.
- - i.e., do not assume and do not say.
Brief commentary
Do not follow - O son of Adam - that which you have no knowledge of, by following suspicions and conjecture. A person will be questioned about the good or bad that he used his hearing, sight and heart for and he will rewarded for the good and punished for the bad.