Tafsir of Al-Qalam 68:16

سَنَسِمُهُ عَلَى الْخُرْ‌طُومِ (We will soon brand him on the snout...68:16). That is, as, disbelievers, out of pride and false sense of power rejected the Divine Message in this world, Allah will disgrace and humiliate them on the Day of Resurrection so that the earlier and later generations will be able to see it. His nose has been described by way of reproach as khurtum (snout). This refers specifically to the long nose of a pig or a trunk of an elephant.