30:51
وَلَئِنْ أَرْسَلْنَا رِيحًا فَرَأَوْهُ مُصْفَرًّا لَّظَلُّوا۟ مِنۢ بَعْدِهِۦ يَكْفُرُونَ
wala-in arsalnā rīḥan fara-awhu muṣ'farran laẓallū min baʿdihi yakfurūna
Yet they will continue in their disbelief, even if We send a [scorching] wind and they see their crops turn yellow.
And if We send a wind [which would spoil the green growth (tilth) brought up by the previous rain], and they see (their tilth) turn yellow - behold, they then (after their being glad,) would become unthankful (to their Lord Allâh as) disbelievers. [Tafsir At-Tabari]