http://en.wikipedia.org/wiki/El_shaddai
The term may mean "God of the mountains," referring to the Mesopotamian divine mountain . [1] The term was one of the patriarchal names for the tribal god of the Mesopotamians. [1] In Exodus 6:3, El Shaddai is identified explicitly with the God of Abraham and with YHWH . [1] The term appears chiefly in the Torah . This could also refer to the Israelite camp's stay at Mount Sinai where God gave Moses the Ten Commandments.