The Urantia Book Study Edition
Urantia Book 93:9.8 links to Old Testament References (KJV):
Abraham's age:
Ge 17:1,
Ge 18:11,
Ge 24:1,
Ge 21:2,
Ge 25:7
Isaac's birth:
Ge 17:16,
Ge 18:10,
Ge 21:1
Isaac's inheritance:
Ge 25:5
Sarah's age:
Ge 17:17,
Ge 18:11,
Ge 23:1
Ketura not wife:
1Ch 1:32,
Ge 25:1