See at my personal blog:
The Day that Tithing Ended — To Now Be Led By the Holy Spirit
Russell Earl Kelly, Ph.D.: Tithing is Not a Christian Doctrine
Many Pastors Still Teach Old Covenant, Pre-Pentecost Tithing—Not Spirit-Led Giving
Tithing or the Carriage Driver?
David Bercot CD teaching: What The Early Christians Believed About Tithing and Fasting? “You might be surprised to know…”
All of my Tithing or Spirit-led posts