2:80
وَقَالُوا۟ لَن تَمَسَّنَا ٱلنَّارُ إِلَّآ أَيَّامًۭا مَّعْدُودَةًۭ ۚ قُلْ أَتَّخَذْتُمْ عِندَ ٱللَّهِ عَهْدًۭا فَلَن يُخْلِفَ ٱللَّهُ عَهْدَهُۥٓ ۖ أَمْ تَقُولُونَ عَلَى ٱللَّهِ مَا لَا تَعْلَمُونَ
And they say, "Never will the Fire touch us, except for a few days." Say, "Have you taken a covenant with Allah? For Allah will never break His covenant. Or do you say about Allah that which you do not know?"
Translation · Saheeh International
Tafsir
Ibn Kathīr (abridged)
The Jews hope They will only remain in the Fire for a Few Days
Allah mentioned the claim of the Jews, that the Fire will only touch them for a few days, and then they will be saved from it. Allah refuted this claim by saying,
قُلْ أَتَّخَذْتُمْ عِندَ اللَّهِ عَهْدًا
(Say (O Muhammad to them): "Have you taken a covenant from Allah'). Hence, the Ayah proclaims, `if you had a promise from Allah for that, then Allah will never break His promise. However, such promise never existed. Rather, what you say, about Allah, you have no knowledge of and you thus utter a lie about Him.' Al-`Awfi said that Ibn `Abbas said about the Ayah,
وَقَالُواْ لَن تَمَسَّنَا النَّارُ إِلاَّ أَيَّامًا مَّعْدُودَةً
(And they (Jews) say, "The Fire shall not touch us but for a few numbered days."). "The Jews said, `The Fire will only touch us for forty days."' Others added that this was the period during which the Jews worshipped the calf.