Kabbalah zu Bereschit 13:3

Then Rabbi Simeon spoke, commencing with the text, “And he went on his journeys from the South even to Bethel, unto the place where his tent had been at the beginning, between Beth-el and Ai” {Gen. 13:3}. He said: We might here have expected the word journey; but instead we read “journeys,” which is intended to mean that on the journey with him was the Divine Presence. It behooves a man to be “male and female,” always, so that his faith may remain stable, and in order that the Presence may never leave him.