﴿ وَإِن يُكَذِّبُوكَ فَقَدْ كَذَّبَتْ قَبْلَهُمْ قَوْمُ نُوحٍۢ وَعَادٌۭ وَثَمُودُ ﴾

“AND IF THEY [who are bent on denying the truth] give thee the lie, [O Muhammad, remember that, long] before their time, the people of Noah and [the tribes of] Ad and Thamud gave the lie [to their prophets],”

(If they deny thee) if the Quraysh deny, O Muhammad, (even so the folk of Noah) denied Noah, (and (the tribes of) 'Aad) the people of Hud denied Hud (and Thamud) the people of Salih denied Salih, (before thee) before your people, (denied) they all denied their messengers;