Kabbalah su Esodo 21:7

In relation to mysteries of the Torah we have to employ an allegory. There is a soul that is the Matron, [Drawn from Malchut of Atzilut] and there is a soul that is a handmaid [Drawn from the world of Beriyah] such as in, "And if a man sell his daughter to be a maidservant" (Exodus 21:7). And there is a soul that is a common maid [From the world of Asiyah]. And so is man. There is a man who is a servant to the soul. Sometimes the soul goes by means of incarnation, [Because of a sin in the previous incarnation], "the dove found no rest for the sole of her foot" (Genesis 8:9), [The soul is not at rest due to this previous sin]. And the Evil Inclination chases it to enter that body, which is a maid to the Evil Inclination. It is a Jewish 'demon' and the soul is Yud {which is called} a Hebrew maidservant, in which this demon (Heb. שֵׁד) becomes Shadai, [Shed plus the letter Yud] because it kept the soul and repented through it, and with it blessed the Holy One, blessed be He, daily with 'Blessed (Heb. בָרוּך)', and with it sanctifies the Holy One, blessed be He, with 'Holy, holy, holy', and with it declares the unity of the Holy One, blessed be He, by Kriat Sh'ma.