Final answer:
The abbreviation 'Lam.' stands for the book of Lamentations in the Old Testament, and Abraham originated from Mesopotamia according to the Hebrew Bible.
Step-by-step explanation:
The Bible book abbreviated as "Lam." is Lamentations, which is a book in the Old Testament. Regarding the question about the origin of Abraham according to the Hebrew Bible, the correct answer is Mesopotamia. Abraham, originally known as Abram, is said to have come from Ur of the Chaldeans, which was an ancient city-state in what is now known as Southern Iraq, part of the region historically referred to as mesopotamia.