Does requiring a ten percent tithe put believers back under the law?
Yes. Mandating a ten percent tithe puts believers back under the law. Paul never commanded a fixed percentage. Instead, giving is to be voluntary, as the Lord has prospered each person, led by the Holy Spirit, not by legal requirement.
Les explains that the ten percent guideline goes back to Abraham in Genesis 14, when Abraham gave ten percent of the spoil to Melchizedek. He maintains that while ten percent is a guideline, mandating it puts believers back under the law. Paul never says that. Instead, Paul says to give as the Lord has prospered you, voluntarily, as led by the Holy Spirit, not under a mandate of law. Les also notes the collection was to be laid by in store on the first day of the week, the resurrection day.