“God also said to Moses, “Say to the Israelites, ‘The LORD, the God of your fathers—the God of Abraham, the God of Isaac and the God of Jacob—has sent me to you.” [Exodus 3:15]
"I have heard them crying out...." Moses was tending the flock of Jethro his father-in-law, the priest of Midian, and he led the flock to the far side of the wilderness and came to Horeb, the mountain of God.
In tending the flock of Jethro, Moses learned valuable lessons about leading God's people. When he went to Horeb (Mount Sinai), the Lord appeared to him in a bush that burned with fire but was not consumed.
Moses saw that though the bush was on fire it did not burn up. So Moses thought, “I will go over and see this strange sight—why the bush does not burn up.”
When the LORD saw that he had gone over to look, God called to him from within the bush, “Moses! Moses!”
And Moses said, “Here I am.”
“Do not come any closer,” God said. “Take off your sandals, for the place where you are standing is holy ground.” Then he said, “I am the God of your father, the God of Abraham, the God of Isaac and the God of Jacob.” At this, Moses hid his face, because he was afraid to look at God.
God reassures Moses that He is the God of his forefathers--Abraham, Isaac, and Jacob.
The LORD said, “I have indeed seen the misery of my people in Egypt. I have heard them crying out because of their slave drivers, and I am concerned about their suffering. So I have come down to rescue them from the hand of the Egyptians and to bring them up out of that land into a good and spacious land, a land flowing with milk and honey.
The Lord promised Moses that He would deliver His people from Egypt and bring them into a land of abundance--that is, Canaan--inhabited by the six heather nations.
God was not oblivious to the plight of His people. God heard and remembered and looked upon the children of Israel and acknowledged their condition. God's response was to bring His servant Moses back to Egypt to lead His people out of that land in the mightiest display of power since the creation of the world.
He is the same God, who listens to His children when they cry to Him.
“There the angel of the LORD appeared to him in flames of fire from within a bush. Moses saw that though the bush was on fire it did not burn up.” [Exodus 3:2]