"And if We sent a wind," and thereby destroyed that crop, "and they saw it" - meaning: the crop - "turning yellow, they would then continue" - [they would become] after that rain - "to disbelieve."
﴿وَلَئِن أرسلنَا ريحًا﴾ فَأَهْلَكْنَا بِهِ ذَلِكَ الزَّرْعَ ﴿فَرَأَوْهُ﴾ يَعْنِي: الزَّرْعَ ﴿مُصْفَرًّا لَظَلُّوا مِنْ بعده﴾ [لَصَارُوا] مِنْ بَعْدِ ذَلِكَ الْمَطَرِ ﴿يَكْفُرُونَ﴾ ﴿