As a young man, Moses leaves the palace and discovers the hardship of his brethren. He sees an Egyptian beating a Hebrew and
kills the Egyptian. The next day he sees two Jews fighting; when he admonishes them, they reveal his deed of the previous day, and Moses is forced to flee to Midian. There he rescues Jethro's daughters, marries one of them--Zipporah--and becomes a
shepherd of his father-in-law's flocks.
In the meantime, the plight of the Children of Israel in Egypt worsens, "and
their cry rose up to G-d."
As Moses is shepherding his flock, he comes upon a burning bush, in which G-d appears to
him and instructs him to go to Pharaoh and demand: "Let My people go, so that they may serve Me."
Moses objects, citing a speech defect he acquired while in the palace, and so
Moses' brother, Aaron, is appointed to serve as his spokesman. In Egypt, Moses and Aaron assemble the elders of Israel to tell them that the time of their redemption has come. The people
believe; but Pharaoh refuses to let them go and even intensifies the suffering of Israel. He increases the burden of labor on his Hebrew slaves, commanding their taskmasters to cease bringing the Israelites straw to make the bricks. Now, they must go to the fields to collect the straw themselves, but maintain the same quota of brick production.
Moses can no longer bear the pain of his brethren; he turns to G-d saying, "Why have You done evil to this people?" G-d promises that the redemption is close at hand, "Now you shall see what I will do to Pharaoh; for with a strong hand shall he let them go, and with a strong hand shall he drive them out of his land."
G-d then reveals Himself to Moses. Employing the "four expressions of redemption," He promises to take out the Children of Israel from Egypt, deliver them from their enslavement, redeem them and acquire them as His own chosen people at Mount Sinai; He will then bring them to the Land He promised to the Patriarchs as their eternal heritage.