Musar su Genesi 35:8

If we follow Rashi -who understands the words אלון בכות in 35,8, immediately before the report of G–d changing Jacob's name and blessing him, as a veiled hint that Rebeccah had died- it seems strange that Jacob would experience a Divine vision at a time when he was in mourning for his mother. We have a tradition that one does not experience prophetic visions except when in a state of joy (Midrash Hagadol Vayigash 45, 27).

The sin of not honoring his mother was greater than the sin of not honoring his father, since people would curse the belly of a woman such as Rebeccah who had produced an Esau. Nachmanides already pointed out that the Torah does mention the death of Deborah, Rebeccah's nursemaid, whereas it does not mention the death of Rebeccah herself; this was to prevent people from cursing the mother who had given birth to an Esau. Nachmanides believes that to report Rebeccah's death might have been in bad taste, seeing that her favorite son could not attend her funeral whereas her other son Esau hated her. Rebeccah's husband Isaac was blind at the time of her death and could not perform the last rites on her. It would have been insulting to Rebeccah's memory to have the Torah mention that she had to be buried by the local Hittites. Nachmanides claims to have found something along these lines in Devarim Rabbah on Parshat Ki Tetze. Rebeccah was buried at night in order to save her embarrassment because her next of kin did not bury her. This is why Jacob named the tree אלון בכות, (plural instead of בכיה, which would have suggested weeping only for the death of Deborah). [I have not found this Midrash where it is supposed to be. Rabbi Chavell attributes this statement to a Tanchuma. Ed.] In view of these commentaries, we must understand the vision Jacob had at that time as a visit by G–d to Jacob in his capacity as a mourner; G–d simply visited him to console him over the loss of his mother Rebeccah. Knowledge of the fact that Esau was the only one who attended Rebeccah's funeral would cause people to consider Rebeccah as a source of curses. The Torah's main purpose was certainly not to confer honour on Deborah. This is what the allusions in our verse are all about. Thus far Nachmanides. [Actually there is more in Nachmanides. Ed.]We thus find that though G–d's blessing of Jacob-Israel in 35,11 includes a very important prophecy, and accords Israel a hitherto unattainable level of spiritual achievement; conversely it also alludes to a penalty that he will incur as a result of the circumstances surrounding the death of his mother.