Tafsir Tanwîr al-Miqbâs min Tafsîr Ibn ‘Abbâs

Verse 85.3

(And by the witness) the day of Friday (and that whereunto he beareth testimony) the day of 'Arafah and it is said it is the day of immolation; it is also said that 'the witness' refers to the children of Adam while 'that whereunto he bears testimony' refers to the Day of Judgement; and it is also said that 'the witness' is Muhammad (pbuh) while 'that whereunto he bears testimony' is his community; Allah swore by all these things that His chastisement of those who disbelieve in Him is very severe,