Read Ruku 89 of the Quran

قَالُوا۟ يَـٰمُوسَىٰٓ إِنَّا لَن نَّدْخُلَهَآ أَبَدًۭا مَّا دَامُوا۟ فِيهَا ۖ فَٱذْهَبْ أَنتَ وَرَبُّكَ فَقَـٰتِلَآ إِنَّا هَـٰهُنَا قَـٰعِدُونَ ﴿٢٤﴾

They said, "O Moses, indeed we will not enter it, ever, as long as they are within it; so go, you and your Lord, and fight. Indeed, we are remaining right here."

قَالَ رَبِّ إِنِّى لَآ أَمْلِكُ إِلَّا نَفْسِى وَأَخِى ۖ فَٱفْرُقْ بَيْنَنَا وَبَيْنَ ٱلْقَوْمِ ٱلْفَـٰسِقِينَ ﴿٢٥﴾

[Moses] said, "My Lord, indeed I do not possess except myself and my brother, so part us from the defiantly disobedient people."

قَالَ فَإِنَّهَا مُحَرَّمَةٌ عَلَيْهِمْ ۛ أَرْبَعِينَ سَنَةًۭ ۛ يَتِيهُونَ فِى ٱلْأَرْضِ ۚ فَلَا تَأْسَ عَلَى ٱلْقَوْمِ ٱلْفَـٰسِقِينَ ﴿٢٦﴾

[Allah] said, "Then indeed, it is forbidden to them for forty years [in which] they will wander throughout the land. So do not grieve over the defiantly disobedient people."