ولو بسط الله الرزق لعباده لبغوا في اﻻرض
And if Allah were to extend the provision for His servants, they would surely rebel in the earth,
means, `if We gave them more provision than they need, this would make them rebel and transgress against one another in an arrogant and insolent manner.'
ولكن ينزل بقدر ما يشاء
إنه بعباده خبير بصير
but He sends down by measure as He wills. Verily, He is, in respect of His servants, the Well-Aware, the All-Seer.
means, but He gives them provision according to what is in their best interests, and He knows best about that. So He makes rich those who deserve to be rich, and He makes poor those who deserve to be poor