Surah As-Saffat 37:138
وَبِٱلَّيْلِ ۗ أَفَلَا تَعْقِلُونَ
And at night. Then will you not use reason?
Translation: Saheeh International
Tafsir
and at night will you O people of Mecca not then understand? what befell them and so take heed therefrom?
Excerpt from Tafsir al-Jalalayn, commentary on 37:138, via Quran.com. The reader has the full commentary and 9 more tafsirs.