AVOUCH
a-vouch':
In English Versions of the Bible only in Deuteronomy 26:17,18, in the sense of "to confess," "avow," "publicly and solemnly declare." The Hebrew form is likewise unique (Hiph. of 'amar).
Bibliography Information Orr, James, M.A., D.D. General Editor. "Entry for 'AVOUCH'". "International Standard Bible Encyclopedia". 1915.