According to Reformed Theology, what is the doctrinal basis for belief in New Testament tithing?

Most Reformed churches refer to "tithes and offerings" as an understanding of the giving structure in church. Reformed Theology as a theological framework is careful about ensuring there is a biblical foundation for worship (regulative principle) and has a strong emphasis on the biblical covenants and their historical administrations. Therefore, I assume there is a basis for the belief that tithing is an enduring New Testament establishment for the church. Ideally, this would be a representative theologian (a reformer, puritan, modern reformed theologian, etc.) explaining the basis for believing that the Bible teaches the tithe as an enduring function of the church that extends beyond the Mosaic administration. I am specifically talking about tithing 10% of the household income as a commandment of God, not the general principle of generous giving which is immediately obvious in the New Testament.