So where and when did the tithe by Christians arise?

Certainly not from the New Testament.

There’s not a single verse there which applies the Old Testament tithe to Christians or the church.

Instead, the New Testament gives new standards to replace the Old Testament’s compulsory tithe:

“Each one must give as he has decided in his heart, not reluctantly or under compulsion, for God loves a cheerful giver.” 2 Cor. 9:7

“Tell them to use their money to do good. They should be rich in good works and generous to those in need, always being ready to share with others.” 1 Tim. 6:18

So again, where and when did the tithe for Christians arise?

The Roman Catholic Church is not the least bit bashful about fessing up as the source, starting in the 6th Century:

“[A]s the Church expanded and various institutions arose, it became necessary to make laws which would insure the proper and permanent support of the clergy. The payment of tithes was adopted from the Old Law, and early writers speak of it as a divine ordinance and an obligation of conscience. The earliest positive legislation on the subject seems to be contained in the letter of the bishops assembled at Tours in 567 and the canons of the Council of Maçon in 585.” ~ “Tithes,” The Catholic Encyclopedia, Vol. 14.

Candidly, in our own experience we’ve found no need for the tithe when we gather to be the church as the New Testament actually commands it …

With elders who emerge and serve among us to help equip us for ministry one to another (rather than hiring professional, hierarchical “clergy” to be the “ones” to primarily minister over us) as we mutually build up each other through the multiple, diverse gifts God distributes among us.

In our relational participatory churches, we collect no tithes and pass no “collection plates.”

Frankly, we have no need for it.

Rather, we encourage everyone to cheerfully give directly to whatever or whoever they deem appropriate.

In over 15 years, we have never lacked the resources needed to function together or help those in need among us.

Amazing. God’s way actually works!