'Abasa 80:36

Surah Abasa is Meccan. According to the reports, while the Prophet was occupied presenting Islam to the leading men of Quraysh, the blind companion Abdullah ibn Umm Maktum came and asked him a question; displeased at the interruption, the Prophet frowned, and the opening verses of the surah were revealed concerning this incident. The surah teaches that priority in conveying the message belongs not to social standing but to those whose hearts turn to the truth.

Tirmizî rivayeti; Vâhidî, Esbâbü'n-Nüzûl