[Al-Qur’an 25:65, translation: Literal (Word by Word)] And those who say, "Our Lord! Avert from us the punishment (of) Hell. Indeed, its punishment is inseparable,
[Al-Qur’an 15:44, translator: Sahih International] It has seven gates; for every gate is of them a portion designated."
Also, this video about the seven super-volcanoes on Earth: they have the potential to cause extinction level eruptions: https://www.youtube.com/watch?v=Uxycc9MPhZU
[Al-Qur’an 7:40, translator: Shakir] Surely (as for) those who reject Our communications and turn away from them haughtily, the doors of heaven shall not be opened for them, nor shall they enter the garden until the camel pass through the eye of the needle; and thus do We reward the guilty.