I remember seeing a passuk that has the phrase "abrah kadabrah," or maybe a Rishon. Does anyone know a source?
I searched the Bar-Ilan books. There are no results.
Craig Conley (Magic Words p. 66) writes:
More popularly, abracadabra is associated with a Hebrew-Aramaic expression, variously transliterated: ibra k'dibra ("I create through my speech") ... Abra kadavra ("I will create with words").
 Estelle Frankel, Sacred Therapy: Jewish Spiritual Teachings on Emotional Healing and Inner Wholeness (2004)
 David Aaron, Endless Light: The Ancient Path of Kabbalah (1998)
I remember reading it in Sefer Heyetzirah, the one with Aryeh Kaplan's peirush.