Gemara

According to the Talmud, it is Elijah the prophet who will awaken the Forefathers. This talmudic tale tells us that Elijah the Prophet was accustomed to visit Rebbi’s (Rabbi Judah the Prince) Yeshiva.

 

Despite Jacob’s having purchased his lot in the cave for a veritable fortune his children had to reclaim the Cave of the Machpelah again, this time with a fight. This event appears in a few Midrashic commentaries as well:

The Cave of Machpelah was the first land purchase by a Jew in Eretz Yisrael. For this reason it is a unique site in the annals of Jewish history.
 This idea is expressed in the following Midrash (Biblical commentary). (Gen./Beresheet Rabba 79:7)

A special significance is attributed by Jewish scholars, to the purchase of the Cave of the Machpelah as they compare it to the Ten Commandments:
“Said Rabbi Eliezer: How much ink is spilled and how many quills are worn out in the writing of the words: ‘The sons of Het’, (who sold the site to Abraham) [for these words, ‘the sons of Het’ are mentioned] ten times-corresponding to the same number of the Ten Commandments”.

                                                     (Gen. Rabba 58:8).

Even the Satan, according to our sages, admits to Abraham’s loyalty to G-d; especially after this trial of the cave purchase:
And it came to pass and the angels came in front of G-d and among them came Satan.
And G-d asked Satan: ”From where do you come?” Answers the Satan: