I think he was unsure that God was going to make his wife pregnant twice, because they were so old.
No, although the same Abraham is mentioned in many books of the Bible.
The story of Abraham is found in the book of Genesis. Starts about chap 11 verse 26. When first mentioned his name is Abram but it is later changed to Abraham.The story of Abraham is also found in a great many, more recent extra-biblical traditions. Bruce Feiler (Abraham) says that probably less than one per cent of the stories told about Abraham appear in the Bible, with an explosion of detail beginning to appear in Jewish tradition from the third century BCE onwards.
The Israelites were (and are) the descendants of Abraham's grandson Jacob, who was renamed Israel (Genesis 35). They had twelve tribes. Abraham himself also fathered non-Israelite sons (Genesis 25).
Four are listed in Genesis (see ch.26 concerning Isaac and Abraham), but there may have been more.Biography of Abraham
Abraham(Abram) had MANY nephews.*His brother, Haran, had Lot (Genesis 11:27)*His brother, Nahor, had many sons (Genesis 11:29; 22:20-24)
God blesses Abraham in Genesis ch.12, 13, 15, 17, and 22.
The word 'in him' is found 118 times in the King James Version (KJV). It first appears in Genesis 18:18. Genesis 18:18 "Seeing that Abraham shall surely become a great and mighty nation, and all the nations of the earth shall be blessed in him?"
It is believed by many that Abraham was born around 2018 BCE, ten generations (350 years) after Noah's Flood (18 generations after Adam).(Genesis 5:3,6,9,12,15,18,21,25,28+9 Adam to Noah)(Genesis 5:32+Genesis 6:10,12,14,16,18,21,23,24,26 Shem to Abraham)
Abram and Sarai had their names changed to Abraham and Sarah in Genesis 17:5,15. Genesis 17:5 No longer will you be called Abram; your name will be Abraham, for I have made you a father of many nations. Genesis 17:15 God also said to Abraham, "As for Sarai your wife, you are no longer to call her Sarai; her name will be Sarah. Abram means "exalted father" and Abraham means "father of many". In biblical times one's name reflected who one was (one's name had a meaning) so when one's life changed so dramatically a new name was appropriate. Likewise, Jacob's name was changed to Israel in Genesis 32:28. Israel means "God struggles" or "one who struggles with God", which reflects Jacob's wrestling with God in Genesis 32.
He withstood all tests and trials. There were many of them: He was persecuted and endangered by Nimrod for speaking against idolatry. His wife was abducted by Pharaoh (Genesis ch.12) and by Avimelekh the Philistine (Genesis ch.20). He was compelled to go into battle to rescue his nephew (Genesis ch.14). He was tested by God to see whom he loved more: his son Isaac, or God (Genesis ch.22). And his wife was barren for many decades (Genesis ch.11, 15 and 16).
When we first read about Abraham his name is Abram. then it gets changed to Abraham: Genesis17:5 No longer shall your name be called Abram, but your name shall be Abraham; for I have made you a father of many nations.
The word god is not found in Genesis 3 The word God is found in Genesis 3 13 times