I'm going to connect some of the dots for a short segment of biblical history. If you know some of the stories buy aren't a biblical scholar then you might get a sense of the bigger picture.
About 1700 BC:
- God calls Abraham to pack up and leave to go to a land that God would show him, and promises him and his wife a child despite their advanced age and childlessness.
- Abraham and his wife Sarah have a child, Isaac. God commands Abraham to sacrifice Isaac but supplies a ram as substitute for the sacrifice at the last second.
- Isaac and his wife Rebekah have children, one of whom is Jacob.
- Jacob has 12 sons, one of whom is Joseph.
- God gives Jacob the name "Israel" after wrestling with him.
- Joseph's brothers are jealous of their father's obvious favoritism of Joseph (including the gift of a coat of many colors) and so they fake his death and sell him into slavery in Egypt.
- Joseph interprets a dream Pharaoh's dream of fat/thin cows as meaning seven years of plenty were coming, followed by seven years of famine. Pharaoh places Joseph in charge of storing the plenty to prepare for the famine
- After the seven years of plenty, Jacob and his family move to Egypt to escape the famine.
- The children of Israel (Jacob) thrive in Egypt, until a Pharaoh comes to power who does not know Joseph. The children of Israel are forced from residing in Egypt to being captive there.
- About 280 years after captivity in Egypt begins, Moses is born.
- At age 80, Moses leads Israel's children (now a multitude) out of Egypt.