Urantia Book
181:1.2
links to Old Testament References (KJV):
Become spiritually perfected:
Ge 17:1,
De 18:13,
Le 19:2,
1Ki 8:61
Heaven of heavens:
Ps 148:4,
De 10:14,
Ne 9:6,
1Ki 8:27,
2Ch 6:18,
2Ch 2:6