Surah Nuh 71:1

إِنَّآ أَرْسَلْنَا نُوحًا إِلَىٰ قَوْمِهِۦٓ أَنْ أَنذِرْ قَوْمَكَ مِن قَبْلِ أَن يَأْتِيَهُمْ عَذَابٌ أَلِيمٌ

Indeed, We sent Noah to his people, [saying], "Warn your people before there comes to them a painful punishment."

Translation: Saheeh International

Tafsir

Verily We sent Noah to his people saying ‘Warn your people before there come on them — should they not believe — a painful chastisement’ in this world and in the Hereafter.

Excerpt from Tafsir al-Jalalayn, commentary on 71:1, via Quran.com. The reader has the full commentary and 9 more tafsirs.