Surah Al-Anfal — Ayah 21 (8:21)
وَلَا تَكُونُواْ كَٱلَّذِينَ قَالُواْ سَمِعۡنَا وَهُمۡ لَا يَسۡمَعُونَ ٢١
English translation (Saheeh International)
And do not be like those who say, "We have heard," while they do not hear.
Brief commentary
And do not be O you believers, like the hypocrites and idolators who when the verses of Allah are recited to them, say that they have heard the Qur’ān that has been recited to them, when they have not listened in a reflective way, learning from it so that they would benefit from what they heard.