Exodus 3:13–15 (CJB)
13 Moshe said to God, “Look, when I appear before the people of Isra’el and say to them, ‘The God of your ancestors has sent me to you’; and they ask me, ‘What is his name?’ what am I to tell them?” 14 God said to Moshe, “Ehyeh Asher Ehyeh [I am/will be what I am/will be],” and added, “Here is what to say to the people of Isra’el: ‘Ehyeh [I Am or I Will Be] has sent me to you.’ ” 15 God said further to Moshe, “Say this to the people of Isra’el: ‘Yud-Heh-Vav-Heh [Adonai], the God of your fathers, the God of Avraham, the God of Yitz’chak and the God of Ya‘akov, has sent me to you.’ This is my name forever; this is how I am to be remembered generation after generation.
Elohim is the most common of the names of God, used thirty-two times in the first chapter of Genesis alone, and twenty-five hundred times in the Tanakh (Hebrew Bible). It is plural in form, though it is commonly construed with a singular verb or adjective. Most probably, this is explained as the plural of majesty or excellence, expressing high dignity or greatness. This ancient name for God conveys the idea of his creative power, authority, and sovereignty. The singular Eloah is relatively rare, occurring only in poetry and late prose (forty-one times in the book of Job). The singular is used in six places for heathen deities (e.g., 2 Chron. 32:15; Dan. 11:37-38), and the plural also a few times either for gods or images (e.g., Exod. 9:1; 12:12; 20:3) or for one god (e.g., Exod. 32:1; Gen. 31:30, 32). In the majority of cases, both are used as names of the one God of Israel.