Al-Ma'idah 5:26

قَالَ فَإِنَّهَا مُحَرَّمَةٌ عَلَيْهِمْ ۛ أَرْبَعِينَ سَنَةً ۛ يَتِيهُونَ فِى ٱلْأَرْضِ ۚ فَلَا تَأْسَ عَلَى ٱلْقَوْمِ ٱلْفَـٰسِقِينَ

Qāla fa-innahā muḥarramatun ʿalayhim arbaʿīna sanatan yatīhūna fī l-arḍi falā tasa ʿalā l-qawmi l-fāsiqīna

[Allāh] 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."