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Psalms 133:1 for (yachadh, "unitedness," and Ephesians 4:3,13 for henotes "oneness." Also Sirach 25:1 the King James Version for homonoia "concord" (so the Revised Version (British and American)).
Orr, James, M.A., D.D. General Editor. "Entry for 'UNITY'". "International Standard Bible Encyclopedia". 1915.