Surah 68. Al-Qalam, Ayah 16

Lit., "We shall brand him on the snout" (khurtum)". All commentators point out that this idiomatic phrase has a strictly metaphorical meaning, namely, "We shall stigmatize him with indelible disgrace" (cf. Lane II, 724, quoting both Raghib and Taj al-'Arus).

 Like 53:33-35 and 74:11-26, these verses refer to Al-Walîd ibn Al-Mughîrah, a leader of the Meccan opposition against Islam. He rejected the Prophet (ﷺ) as a madman, so the Quran responded by listing ten of his qualities—two of which were unknown to him: the fact that he was born out of wedlock and that his nose would be chopped off several years later at the Battle of Badr. At least three of his ten sons accepted Islam—including Khâlid ibn Al-Walîd.

Literally, proboscis, the most sensitive limb of the elephant. The sinner makes himself a beast and can only be controlled by his snout.