ציטירנדיקער פּירוש אויף יחזקאל 31:16

ויפח באפיו נשמת חיים, G’d blew into man some of the spirit prevailing in the highest regions on earth. Whereas the life force of the animals is described as נפש חיים, something abstract but originating in physical earth, man’s life force is called here נשמה, to alert us to the fact that the origin of this life force is not physical, has not been supplied by earth, in fact could not have been supplied by earth. Our verse illustrates what G’d had meant when He had announced that man would be בצלמנו כדמותנו, “in Our image, Our likeness.” (1,24). This is so in spite of the fact that sometimes man is equipped additionally with רוח and נפש. The expression נשמה is reserved exclusively for describing man, whereas the other two expressions, describing non-tangible animalistic forms of energy called “life-force,” are shared by man and beast. You may argue that the Torah describes all of the living creatures by invoking the term נשמה in Genesis 7,22. We are told there: כל אשר נשמת רוח חיים באפיו וגו', “every creature which had the soul and spirit of life in its nostrils… died.” We must understand that verse as meaning that man who possessed both a נשמה as well as רוח חיים, died.”

כל אשר נשמת רוח חיים באפיו, both the words נשמת and רוח are in a construct mode belonging to the word חיים, as if the Torah had written נשמת חיים ורוח חיים. Other examples of such a construction are found in Ezekiel 31,16 מבחר וטוב לבנון, “the choicest and best of Lebanon.” Or, Job 20,17 נהרי נחלי דבש וחמאה, “the streams, the rivers of honey, the brooks of cream.” The Torah, when referring to man, speaks of נשמת, whereas when speaking of the animals it describes their essence of life as רוח חיים.