(…and that remembering ears (that heard the story) might remember) [69:12].
Abu Bakr al-Tamimi informed us> ‘Abd Allah ibn Muhammad ibn Ja‘far> al-Walid ibn Abban> al-‘Abbas al-Duri> Bishr ibn Adam> ‘Abd Allah ibn al-Zubayr> Salih ibn Haytham> Buraydah who reported that the Messenger of Allah, Allah bless him and give him peace, said to ‘Ali: “Allah has commanded me to draw you closer to me and not exclude you and that I teach you so that you understand; and Allah has taken it upon Himself that you understand”, and then this verse was revealed (and that remembering ears (that heard the story) might remember).
Asbab Al-Nuzul by Al-Wahidi , trans. Mokrane Guezzou