This definition appears very rarely
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Samples in periodicals archive:
Laus Deo! The Harmony of Zion , or Union Compiler. Containing a concise introduction to the grounds of musick. Also, a choice collection of church musick, and anthems. Principally from European authors. By Stephen Jenks.
God's Promise to Zion, of Union and Harmony Among Her Watchmen: A Sermon Delivered at the Ordination of the REV. Alvan Tobey, A.M., to the Pastoral Care of the Church in Wilmington, (Ver.), September 14, 1803. by Josiah Spaulding, 9781275800397, available at Book Depository with free delivery worldwide.
The Harmony of Zion; or, Union Compiler. Dedham, 1818.
Get this from a library! God's promise to Zion of union and harmony among her watchmen : a sermon, delivered at the ordination of the Rev. Alvan Tobey ... September 14, 1803. [Josiah Spalding]