[And that it is He who enriches and contents.] He enriched His servant, and bestowed property upon him from the perspective of possession (qinyah).
Muhammad said: You say, 'I acquired such and such' (aqnaytu), meaning: I worked to ensure it remains with me and I do not let it leave my hands. It is as if the meaning of (aqna) is: making wealth a fixed, stable asset for its owner.
﴿وَأَنه هُوَ أغْنى وأقنى﴾ أغْنى عَبده، وأقناه من قِبَل القِنْيَة.
قَالَ محمدٌ: تَقول: أَقْنَيْتُ كَذَا أَي: عملتُ على أَنه يكون عِنْدِي لَا أخرجه من يَدي؛ فَكَأَن معنى (أقنى) جعل الْغنى أصلا لصَاحبه ثَابتا.