"40 The time that the Israelites had lived in Egypt was four hundred thirty years. 41 At the end of four hundred thirty years, on that very day, all the companies of the Lord went out from the land of Egypt. " Ex. 12:40-41 (NRSV)
In this case, then Israelites must have come into Egypt around 1876 BC. When the Israelites came into Egypt Jacob was 130 years old, meaning that Jacob was born around 2006 BC. Isaac was 60 when Jacob was born, so the birth of Isaac is 2066 BC (+-1). Abraham was 100 years old when Isaac was born, so his birth was 2166 BC (+-2).
We can go all the way back to the Flood. The only small problem is Terah - he was 130 when Abraham was born (see Acts 7:4). So adding up the geneaologies from the birth of Abraham we get:
130+29+30+32+30+34+30+35+2=352. Since the birth of Abraham was in 2166 BC (+-2), then the Flood would have been in 2518 BC (+-11).
We then go back 1656 (+-9) more years for the creation of Adam:
4174 BC (+-20)
So the main dates are as follows:
The Creation: 4174 BC (+-20)
The Flood: 2518 BC (+-11)
Israel was not in Egypt for 430 years.
The promise was made to Abraham exactly 430 years to the day of the Exodus.
They came out in the fourth generation from Abraham, an God counted the generations promised differently than we would think, for Moses was the son of Jochebed, who was the daughter of Levi, who was born to him at the gates of Egypt. She married the son of her brother, and God counted Moses the son of Levi, then, through her.
Moses was 82 when they came out of Egypt, and his mother was born when Israel entered Egypt. Adding up the years in Genesis to Exodus gets 210 years in Egypt, and only after Joseph died did Egypt begin to be oppressive to Israel because they feared them, and slowly, by degrees, they took away everything and enslaved them.
The promise was made 430 years before they exited Egypt
Moses was 82
430 - 82 =348 years from the promise to Moses birth
Moses was the son of Jochebed, the daughter of Levi
Jochebed was born to Levi at the gates of Egypt.
Exd 6:20 And Amram took him Jochebed his father's sister to wife; and she bare him Aaron and Moses: and the years of the life of Amram
were an hundred and thirty and seven years.
Num 26:59 And the name of Amram's wife
was Jochebed, the daughter of Levi, whom
her mother bare to Levi in Egypt: and she bare unto Amram Aaron and Moses, and Miriam their sister.
Now, the book of Jasher states Jochebed was 128 years old when Moses was born
348 -128 - 220 from the promise to the entry of Egypt.
430 -220 = 210 years in Egypt, and Joseph was 39 years old when they entered, and was king in Egypt after they entered for 39 more years. Jochebd was 39, then, when Joseph died, and Moses was born only 43 years later.
So the years from Joseph's death to Moses birth were 43. Israel was not oppressed immediately, but gradually, so that by the time Moses was born, they were drowning the baby boys [which stopped upon Moses' adoption, BTW].
Moses fled Egypt at age 18 -not age 40, and fled to Cush [translated Ethiopia but it was not present Ethiopia]; he then saved the kingdom by wisdom; married the widowed Cush-ite/Ethiopian queen by request of the Cush-ite people, when the king had later died; and ruled the land until the prince born to the late king grew up and became king.
Moses went away in peace, and came to Midian, where he later married Ziporrah, after a few more adventures -like being imprisoned by her father for ten years because he feared the Pharaoh and knew who Moses was. Moses and Zipporah were only married a few years and their two sons were less than age 3 when God sent Him to Egypt to deliver His people, age 80, cause it was the promised time.
Now: 210 years in Egypt and Jacob 130 when they entered =80 years earlier the promise was given.
Isaac was 60 when Jacob was born.
80 -60 =20
The promise, then, was given to Abraham 20 years before Isaac was born.
Ishmael was born 15 years before Isaac, so the promise was given to Abraham 5 years before Ishmael was born.
Abraham was born to Terah when Terah was 70 years old, also, not 130. That is an error of Usher.
But the Book of Jasher takes all the pain out of searching through the accounts to add and subtract and get the right dates laboriously, because Jasher has the full chronology from Adam to the exodus from Egypt.
Book of Jasher Bible - SpeedBible by johnhurt.com
Because Jochebed was Moses mother, and because Moses was 82 when Israel exited Egypt, then there is no way Israel was in Egypt 430 years. That would make Jochebed 348 years old when she gave birth to Moses. Now Noah's wife was a hundred years older than he and he did not have children until after he married her at age 500, but by Jochebed's time, they were not having children at age 348, though she was 128.