Sadly, the teachers who teach the prosperity gospel always take their context from the old testament, the Israelites were promised land, wealth, tangible prosperity if they followed God. Under the new covenant, God has promised us all things Spiritual in order to live godly and holy lives. Ephesians is an excellent book to read in order to understand all the promises God has given to the believer under the new covenant.
Ephesians 1:3 "Praise be to God the Father of our Lord Jesus Christ, who has blessed us in the heavenly realms with every spiritual blessing". (Notice how this does NOT say that God has blessed us with material possessions in the earthly realms).
The old covenant promises consisted of the physical nature.
The new covenant promises consists of the spiritual nature.
Praise God, believers are promised gifts of the spiritual nature in order to live godly, holy and righteous! We can focus on living a godly life and have very few possessions.
Matthew 6:19-21 "Do not store up for yourselves treasures on earth, where moths and vermin destroy, and where thieves break in and steal. But store up for yourselves treasures in heaven, where moths and vermin do not destroy, and where thieves do not break in and steal. For where your treasure is, that is where your heart is also".
Praise God he has blessed us with every spiritual blessing in the heavenly realms! He is a good God!