The idea that there are exactly seven archangels goes back to the Book of Tobit, where Raphael identifies himself as one of the seven who stand ready and enter before the glory of the Lord, and to the Book of Enoch, which supplies an actual list of seven names, though different manuscripts of Enoch disagree on exactly who belongs on it, some giving Uriel, Raphael, Raguel, Michael, Saraqael, Gabriel and Remiel. Barachiel does not appear in any of those earliest sevenfold lists at all; his place among the seven is a distinctly Eastern Christian development, fixed in the Byzantine liturgical tradition's own Synaxis of the Bodiless Powers, celebrated on 8 November, which names Michael, Gabriel, Raphael, Uriel, Selaphiel, Jegudiel and Barachiel, with Jerahmeel sometimes added as an eighth.
That list has never been formally adopted in the Latin West, where medieval and modern Catholic devotion generally confines itself to the three archangels named in canonical scripture, Michael, Gabriel and Raphael, treating the additional Enochic and Eastern names as pious tradition rather than doctrine. Barachiel's cult is accordingly strongest precisely where the Byzantine liturgical calendar is followed, in the Eastern Orthodox and Eastern Catholic churches, where his November feast and his association with the blessings of ordinary daily labour give him a devotional prominence in the East that has no real Western counterpart.