@MrB As New Testament believers, we are to honor God mind, body and soul - we belong to God. It is not just a monetary tithe - we serve God by renewing our mind and living a holy life and serving one another in love. I would say that to do any less than that is to rob God within a New Covenant context.
Romans 12:1-2 - Therefore, I urge you, brothers and sisters, in view of God’s mercy, to offer your bodies as a living sacrifice, holy and pleasing to God—this is your true and proper worship. 2 Do not conform to the pattern of this world, but be transformed by the renewing of your mind. Then you will be able to test and approve what God’s will is—his good, pleasing and perfect will.
I Cor 6:18-20 - Flee from sexual immorality. All other sins a person commits are outside the body, but whoever sins sexually, sins against their own body. 19 Do you not know that your bodies are temples of the Holy Spirit, who is in you, whom you have received from God? You are not your own; 20 you were bought at a price. Therefore honor God with your bodies.
Philippians 2:3-5 - Do nothing out of selfish ambition or vain conceit. Rather, in humility value others above yourselves, 4 not looking to your own interests but each of you to the interests of the others.
5 In your relationships with one another, have the same mindset as Christ Jesus
Ephesians 4:32 - Be kind and compassionate to one another, forgiving each other, just as in Christ God forgave you.
All throughout Scripture, we are called to give God all that we are, but as followers of Christ that commandment is now rooted in the cross and in the love of Jesus.
Deut 6:4-9 - Hear, O Israel: The Lord our God, the Lord is one. 5 Love the Lord your God with all your heart and with all your soul and with all your strength. 6 These commandments that I give you today are to be on your hearts. 7 Impress them on your children. Talk about them when you sit at home and when you walk along the road, when you lie down and when you get up. 8 Tie them as symbols on your hands and bind them on your foreheads. 9 Write them on the doorframes of your houses and on your gates.