Word by Word Analysis

وَقَالُوا۟ لَن تَمَسَّنَا ٱلنَّارُ إِلَّآ أَيَّامًا مَّعْدُودَةً ۚ قُلْ أَتَّخَذْتُمْ عِندَ ٱللَّهِ عَهْدًا فَلَن يُخْلِفَ ٱللَّهُ عَهْدَهُۥٓ ۖ أَمْ تَقُولُونَ عَلَى ٱللَّهِ مَا لَا تَعْلَمُونَ 80

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?"