Todoros Abulafia, Otzar ha-Kavod ha-Shalem (Jerusalem, 1970) 3a.

Jewish Mysticism
“Where dogs bark there the Angel of Death is to be seen, for [he] is emanated from the left side which is an emanation in itself.”

Translated by Elliot Wolfson in “Light Through Darkness- The Ideal of Human Perfection in the Zohar,” Harvard Theological Review 81 (1988)- 73-95.