Genèse 35:8

And Deborah, the nurse of Rivekah, died, and was buried below Bethel, in the field of the plain. And there it was told Jakob concerning the death of Rivekah his mother; and he called the name of it, The other weeping.

AND DEBORAH REBEKAH’s NURSE DIED. I do not know why this verse has been placed between the verse, And he called the place El-beth-el and the following verse, And G-d appeared to Jacob again. Scripture thus interrupts one subject which occurred at one time and in one place for when Jacob came to Luz, that is Beth-el, he built an altar there and he called the place El-beth-el, and G-d appeared to him there and He blessed him. Why then was this verse concerning Deborah’s death placed in the midst of one subject?
A feasible answer is that which our Rabbis have said, namely that the verse alludes to the death of Rebekah, and therefore Jacob called the name of that place, Alon-bachut (the oak of weeping), for the weeping and anguish could not have been such for the passing of the old nurse that the place would have been named on account of it. Instead, Jacob wept and mourned for his righteous mother who had loved him and sent him to Paddan-aram and who was not privileged to see him when he returned. Therefore G-d appeared to him and blessed him, in order to comfort him, just as He had done to his father Isaac following the death of Abraham. With reference to both of them the Sages have said that He gave them the blessing of consolation addressed to mourners. Proof for this is that which is said below, And Jacob came unto Isaac his father to Mamre, for had Rebekah been there, Scripture would have mentioned “unto his father and unto his mother” for it was she who sent him. to Paddan-aram and caused him all the good, for Isaac commanded him to go there at her advice.
Now Rashi commented: “Because the time of her death was kept secret in order that people might not curse her — the mother who gave birth to Esau — Scripture also does not make mention of her death.” This is a Midrash of the Sages. But neither does Scripture mention the death of Leah! Instead, we must say that the intent of the Sages was to explain why Scripture mentions Rebekah’s death by allusion, connecting the matter with her nurse. Since Scripture did refer to it, they wondered why the matter was hidden and not revealed. And the justification for the curse stated by Rashi is not clear since Scripture mentioned Esau at the death of Isaac, And Esau and Jacob his sons buried him.
It is, however, possible to say that Rebekah’s death lacked honor, for Jacob was not there, and Esau hated her and would not attend; Isaac’s eyes were too dim …

אלון בכות, this is mentioned only because all the locations at which Yaakov stopped on his return from Lavan and which were mentioned in the Torah were mentioned because of something that happened there. They were: Pnuel, Sukkot, El Elo-hey Yisrael, Shalem, the city of Shechem. Luz(ah), El Bet El, Alon Bachut, the second Bet El, Bet Lechem (Efrat), Migdal Eder.

אלון בכות. Mourning results in the withdrawal of the Divine Presence as we know from Shabbat 30. Until Yaakov had passed this tree after mourning Deborah the Divine Presence did not return and accompany him. [He was deprived of such a Presence during all the 22 years that he was mourning for his son Joseph, thinking him dead. Ed.].

ותמת דבורה, according to Rashi, Rivkah had sent word to Yaakov by means of Devorah in accordance with her promise at the time that as soon as Esau’s anger would subside she would recall him from his exile. (27,45) When Devorah delivered the message at Bet El she died forthwith.

תחת האלון, beneath the oak. This category of tree also appears in Hoseah 4,13 and in Ezekiel 27,6. According to Onkelos the word is the same as אלוני ממרא with the vowel tzeyreh, i.e. it describes a certain valley or a grove of trees. In Bereshit Rabbah 81,5 Rabbi Shemuel bar Nachman understands the meaning of the word alon as derived from the Greek, where it means “double, additional,” The Torah hints that before the mourning for Deborah was over, news reached Yaakov that his mother Rivkah had died.

ותמת דבורה, Deborah, Rivkah’s nursemaid died (near there) the reason why we are told about this at this point may be on account of the prophetess Deborah sitting and holding court near this tree, by the grave of Deborah (Judges, 4.5.)