Surah Al-Baqarah 2:80

وَقَالُوا۟ لَن تَمَسَّنَا ٱلنَّارُ إِلَّآ أَيَّامًا مَّعْدُودَةً ۚ قُلْ أَتَّخَذْتُمْ عِندَ ٱللَّهِ عَهْدًا فَلَن يُخْلِفَ ٱللَّهُ عَهْدَهُۥٓ ۖ أَمْ تَقُولُونَ عَلَى ٱللَّهِ مَا لَا تَعْلَمُونَ

And they say, "Never will the Fire touch us, except for [a few] numbered days." Say, "Have you taken a covenant with Allāh? For Allāh will never break His covenant. Or do you say about Allāh that which you do not know?"

Translation: Saheeh International

Tafsir

And they say when the Prophet promised them the Fire ‘the Fire shall not touch us that is afflict us save a number of days’ only a short time of forty days the same length of time their forefathers worshipped the calf after which time it the Fire will cease. …

Excerpt from Tafsir al-Jalalayn, commentary on 2:80, via Quran.com. The reader has the full commentary and 9 more tafsirs.