Surah Al-Ma'idah, Verse 26

قَالَ فَإِنَّهَا مُحَرَّمَةٌ عَلَيۡهِمۡۛ أَرۡبَعِينَ سَنَةٗۛ يَتِيهُونَ فِي ٱلۡأَرۡضِۚ فَلَا تَأۡسَ عَلَى ٱلۡقَوۡمِ ٱلۡفَٰسِقِينَ٢٦

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."