And where does that come from?
you: And where does that come from?
The Hebrew terms used for the soul/spirit include:
neshama - which is the "breath of God" only given to Adamic man in Genesis 2, i.e. the spiritual part of man which animals do not have
ruach - which is the soul of the man (term used throughout the Old Testament.) Jewish teaching is that this is the seat of the free will, man chooses whether to be God-centered (neshama) or earthy/carnal-centered (nephesh). See also Romans 8.
ruach Elohim - the Spirit of God who indwells us Christians (John - esp. 3, 14-17, Romans 8, I Cor 2, etc.)
Would Christ have told us to pray "thy will be done" to the Father without meaning?