Some will use Malachi 3:8-10 to say that tithing is commanded for all people.  They'll teach that God will bless you with more if you are faithful to tithe.  But that is not what that verse means.  This passage is addressed to the nation of Israel under the Old Covenant.  As New Covenant believers, we give from our hearts which is a work of God's grace in our lives.

Malachi 3:8-10... 8 “Will a mere mortal rob God? Yet you rob me. “But you ask, ‘How are we robbing you?’ “In tithes and offerings. 9 You are under a curse—your whole nation—because you are robbing me. 10 Bring the whole tithe into the storehouse, that there may be food in my house. Test me in this,” says the Lord Almighty, “and see if I will not throw open the floodgates of heaven and pour out so much blessing that there will not be room enough to store it.