And it came to past, when Moses became an adult, that he one day went out to visit his Hebrew brothers, and he saw how they suffered.
He saw an Egyptian swearing at one of his brothers, and he became so angry that he killed the Egyptian, when they were alone, and buried him in the sand.
On the second day, when he went out to his brothers, he saw that two of his Hebrew brothers fighting with each other. He asked the one why he would talk in such a manner to his brother. His brother replied: 'Who made you prince and judge over us? Are you going to kill me too, like you killed the Egyptian?' Moses got scared, because he didn't know that anybody saw him, and he knew that it was not a secret.
The story of the killing reached Pharaoh, and he was extremely angry at Moses. He sought to slay Moses.
So Moses fled from the face of Pharaoh, and went to dwell in the land of Midian. Then, one day, he sat down at a well to rest.
Now, the priest of Midian had seven daughters, whom would go this well to drew water for their father's throughs, to water their father's flock.
And the sheperds came and wanted to drive them away, but Moses stood up to them and helped the daughters, and watered their flock.
When they came to Reuel, their father, he said: 'How is it that you came so soon today?
So they answered: 'An Egyptian delivered us out of the hands of the sheperds, and he also drew enough water for us and the flock.'
And he said to his daughters: 'And where is he? Why is it that you left the man? Call him that he may eat bread.'
And Moses was content to dwell with Reuel [Jethro], and the priest gave his daughter Zipporah to Moses as his wife.
And she bare him a son, and he called his name Gershom, for he said: 'I have been a stranger in a strange land.'
And as time went on, it came to pass that the king of Egypt died.
And the children of Israel sighed by reason of their bondage, and they cried, and their cry came unto God by reason of His bondage with Israel [Jacob].
And God looked upon the children of Israel, and God had respect unto them.
Now, Moses kept the flock of his father-in-law, the priest of Midian, and he led the flock to the backside of the desert, and came to the mountain of God, even to Horeb.
And the angel of The Lord appeared unto him in a flame of fire out of the midst of a bush ... and he looked, and, behold, the bush burning to fire, and the bush was not consumed.
And Moses said: 'I will now turn aside, and see this great sight, why the bush is not burnt.'
And when The Lord saw that he turned aside to see, God called unto him out of the midst of the bush ... and said: 'Moses, Moses.' And he said: 'Here I am.'
And The Lord said: 'Draw not thy hither ... put off thy shoes from thy feet, for the place whereon thou standest is holy ground.'
Moreover, He said: 'I am the God of thy father, the God of Abraham, the God of Isaac, and the God of Jacob.'
And Moses hid his face, for he was afraid to look upon God.
And The Lord said: 'I have surely seen the affliction of my people which are in Egypt, and heard their cry by reason of their taskmasters ... for I know their sorrows. And I come to deliver them out of the hands of the Egyptians, and to bring them up of that land unto a good land and a large,
unto a land flowing with milk and honey; unto the place of the Canaanites.
Now, therefore, behold, the cry of the children of Israel is come unto Me ... and I have also seen the oppression wherewith the Egyptians oppress them.
Come now therefore, behold, and I will send thee unto Pharaoh, that thou mayest bring forth my people the children of Israel out of Egypt.'
And Moses said unto God: 'Who am I, that I should go unto Pharaoh, and that I should bring forth the children of Israel out of Egypt?'
And The Lord said: 'Certainly I will be with thee; and this shall be a token unto thee, that I have sent thee ... when thou hast brought forth the
people out of Egypt, ye shall serve God upon this mountain.'
And Moses said unto God: 'Behold, when I come unto the children of Israel, and say unto them ... The God of thy fathers hath sent me unto you ... and they shall say to me: 'What is his name?' ... what shall I say unto them?'
And God said unto Moses: 'I AM THAT I AM.' ... and He said: 'Thus shalt thou say unto the children of Israel: I AM hath sent Me unto you.'
Source: Exodus 2-3