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wa-li-llāhi mā fī s-samāwāti wa-mā fī l-ʾarḍi li-yajziya lladhīna ʾasāʾū bi-mā ʿamilū wa-yajziya lladhīna ʾaḥsanū bi-l-ḥusnā
To Allah belongs whatever is in the heavens and whatever is in the earth, that He may requite those who do evil for what they have done, and reward those who do good with the best [of rewards].
— Ali Quli Qarai
Surah al-Najm - Verse 31
31. And to Allah belong all that is in the heavens and all that is in the earth, that He may requite those who do evil with that which they have done and reward those who do good with what is best.
The blessed Verse in question proceeds with treating of Divine Omniscience as to the astray and the guided, saying that whatever exists in the heavens and the earth belongs to God Almighty. He is the Absolute Possessor and the Absolute Sovereign in the world of existence therefore He solely deserves to be worshipped and He is the only One of Whom man may expect intercession.
The main cause for the creation of the world of being is that man, the superior being in the world of existence, be guided toward the path of perfection through existential, legislative, and didactic schedules applied by Prophets. Thus, the blessed Verse in question closes with the consequence of such Possession by saying that the creation of the world aims at requiting those who do evil with that which they have done and reward those who do good with what is best.