Exodus 3:12-14 Young's Literal Translation (YLT)
12 and He saith, `Because I am with thee, and this [is] to thee the sign that I have sent thee: in thy bringing out the people from Egypt -- ye do serve God on this mount.'
13 And Moses saith unto God, `Lo, I am coming unto the sons of Israel, and have said to them, The God of your fathers hath sent me unto you, and they have said to me, What [is] His name? what do I say unto them?'
14 And God saith unto Moses, `I Am That Which I Am;' He saith also, `Thus dost thou say to the sons of Israel, I Am hath sent me unto you.'