Al-Tawba (The Repentance) - Chapter 9: Verse 111 (partial)
"Truly God has purchased from the believers their souls and their wealth in exchange for the Garden being theirs."
Al-Razi notes that a subtlety of this verse is that in this profound transaction God is both the buyer and the seller, akin to the way an adult would transact the affairs of a helpless infant. He goes on to note that in the verse God affirms that the immortal substance of a human being "owns" both its ephemeral body and its worldly property, and that by giving both of these over for God's use this immortal substance purchases, as it were, the Garden. This does not change the fact that God is beyond any need for such transactions, and that the wording of this verse is meant as a kindness, a gentleness, and an act of subtlety on the part of God.
"The Study Quran: A New Translation and Commentary" - Seyyed Hossein Nasr