* The Bible uses "adoption" and "adopt" in a figurative way to describe how God causes people to be part of his family, making them his spiritual sons and daughters.
* This term could be translated with a term that the language of translation uses to describe this special parent-child relationship. Make sure it is understood that this has a figurative or spiritual meaning.
* The phrase "experience adoption as sons" could be translated as "be adopted by God as his children" or "become God's (spiritual) children."
* To "wait for the adoption of sons" could be translated as "look forward to becoming God's children" or "wait expectantly for God to receive as children."