In the Old Testament, the Israelites believed in more than one God, and this is seen in multiple Bible verses - Exodus 15:11 'Who is like thee, o Lord, among these gods' and Psalm 86:8 'There is none like thee among the gods, o Lord'. One of the names for God in the Bible is 'Elohim' which in Hebrew translates to 'gods' - God was seen as the head of the gods