﴿ أَمَّنْ هَٰذَا ٱلَّذِى يَرْزُقُكُمْ إِنْ أَمْسَكَ رِزْقَهُۥ ۚ بَل لَّجُّوا۟ فِى عُتُوٍّۢ وَنُفُورٍ ﴾

“Or is there any that could provide you with sustenance if He should withhold His provision [from you]? Nay, but they [who are bent on denying the truth] stubbornly persist in their disdain [of God's messages] and in their headlong flight [from Him]!”

Or who is it that will provide for you if He the Compassionate One withholds His provision? that is to say if He withholds the rain from you the response to the conditional has been omitted but is indicated by what preceded it namely the statement to the effect ‘who will provide for you?’ and so the response would be you have no provider other than Him. Nay but they persist in disdain and aversion moving away further from the truth.