﴿ أَلَمْ نُهْلِكِ ٱلْأَوَّلِينَ ﴾

“Did We not destroy [so many of] those [sinners] of olden days?”

أَلَمْ نُهْلِكِ الْأَوَّلِينَ (Did We not destroy the earlier people?...77:16) It refers to the nations of ` Ad, Thamud, nation of Lut (علیہ السلام) and Fir'aun (The Pharaoh) who were destroyed because of their obstinacy.