Берешит 29:30 Мидраш: Midrash Tanchuma Buber, Aggadat Bereshit & Bereshit Rabbah

[Another interpretation (of Gen. 29:31): WHEN THE LORD SAW THAT LEAH WAS HATED.] This text is related (to Deut. 21:15-17): WHEN A MAN HAS TWO WIVES, < THE ONE BELOVED AND THE OTHER HATED, AND WHEN BOTH THE BELOVED AND THE HATED HAVE BORNE HIM SONS WITH THE FIRST-BORN BELONGING TO THE HATED WOMAN; THEN, ON THE DAY THAT HE WILLS HIS PROPERTY TO HIS SONS AS AN INHERITANCE, HE MAY NOT TREAT THE SON OF THE BELOVED AS THE FIRST-BORN IN PREFERENCE TO THE SON OF THE HATED WHEN HE IS THE FIRST-BORN. INSTEAD, HE SHALL RECOGNIZE THE FIRST-BORN SON OF THE HATED WOMAN BY GIVING HIM A DOUBLE PORTION SINCE HE IS THE FIRST FRUIT OF HIS STRENGTH >. < (Deut. 21:15:) WHEN A MAN HAS >: This is Jacob, as stated (in Gen. 25:27): JACOB WAS A PERFECT MAN. (Deut. 21:15, cont.:) TWO WIVES: Leah and Rachel. (Ibid., cont.:) THE ONE BELOVED, i.e., Rachel, as stated (in Gen. 29:30): AND HE ALSO LOVED RACHEL. (Deut. 21:15, cont.:) AND THE OTHER HATED: i.e., Leah, as stated (in Gen. 29:31): WHEN THE LORD SAW THAT LEAH WAS HATED. (Deut. 21:15, cont.:) AND WHEN BOTH THE BELOVED AND THE HATED HAVE BORNE HIM SONS, i.e., both of them bore for him.³⁷The passage may interpret banot (“daughters”) as bonot (“builders”) who would build up a worthy lineages. Moreover, what Leah produced Rachel produced.³⁸Similarly Gen. R. 70:15. Leah produced kings, and so did Rachel [produce kings. Leah produced prophets, and so did Rachel produce prophets]. Leah produced judges, and so did Rachel. It is therefore stated (in Deut. 21:15): AND WHEN < BOTH THE BELOVED AND THE HATED > HAVE BORNE HIM SONS. (Deut. 21:16:) THEN, ON THE DAY THAT HE WILLS < HIS PROPERTY > TO HIS SONS AS AN INHERITANCE. When the time had come for him to depart from the world, (according to Gen. 49:1): THEN JACOB CALLED HIS SONS. (Deut. 21:16, cont.:) HE MAY NOT TREAT THE SON OF THE BELOVED, < i.e., > Joseph, AS THE FIRST-BORN. Why? (Vs. 17:) INSTEAD, HE SHALL RECOGNIZE THE FIRST-BORN SON OF THE HATED WOMAN < BY GIVING HIM A DOUBLE PORTION >. This was Reuben, as stated (in Gen. 49:3): REUBEN, YOU ARE MY FIRST-BORN, < MY MIGHT AND THE FIRST FRUIT OF MY STRENGTH, EXCELLING IN ELEVATION AND EXCELLING IN POWER >. < Jacob gave this blessing >, even though he said to his shame (in vs. 4): UNSTABLE AS WATER, YOU SHALL NO LONGER EXCEL; < FOR YOU WENT UP TO YOUR FATHER'S BED, THEN DEFILED IT >. What is the meaning of (ibid., cont.) HE WENT UP TO MY COUCH. When Moses would come, about whom it is written (in Exod. 19:3): THEN MOSES WENT UP TO GOD, he would redeem him. As Moses stood < there >, he sought mercy for him. It is so stated (in Deut. 33:6): LET REUBEN LIVE. The Holy One said (ibid., cont.): AND LET HIM NOT DIE. It turns out that he gets {compensation in proportion to both of them} [a pardon³⁹Gk.: demos (“common people”). This meaning of demos may be suggested by demotikos agon, a public festival with games in connection with which amnesties might be given. Cf. Lat.: dimissus. from the mouth of both of them] (i.e., God and Moses). Thus it is stated (in Deut. 21:17): INSTEAD, HE SHALL RECOGNIZE THE FIRST-BORN [SON OF THE HATED WOMAN] BY GIVING HIM A DOUBLE PORTION. (Deut. 33:6:) LET REUBEN LIVE, AND LET HIM NOT DIE; < i.e., > LET REUBEN LIVE in this world, AND LET HIM NOT DIE in the world to come. Why? (Deut. 21:17:) SINCE HE IS THE FIRST FRUIT OF HIS STRENGTH. [It is also written (in Gen. 49:3): MY MIGHT AND THE FIRST FRUIT OF MY STRENGTH.]

[3] Another interpretation: "And the Lord saw that Leah was hated. And it shall be that the man [Jacob] will have two wives (Deuteronomy 21:15). Rabbi Berechiah said: This man is Jacob, as it is stated, 'And Jacob was a simple man' (Genesis 25:27). There were two wives, Rachel and Leah. The one [Leah] was beloved, as it is written, 'this is Leah' (Deuteronomy 21:15), and the other was unloved, as it is written, 'And the Lord saw that Leah was unloved' (Genesis 29:31). Both of them bore children for him [Jacob]. What Leah accomplished, Rachel accomplished. Leah gave birth to kings, and Rachel gave birth to kings. Leah gave birth to prophets, and Rachel gave birth to prophets. Leah gave birth to judges, and Rachel gave birth to judges. And the firstborn son was to the unloved [Leah], this is Reuben, as it is stated, 'And Leah conceived and bore a son, and she called his name Reuben' (Genesis 29:32). And on the day that he [Jacob] bestowed his blessing, at the time when Jacob sought to depart from the world, he called his sons [to him]... 'he shall not give the son of the beloved [Rachel] precedence over the son of the unloved [Leah],' to Joseph [he gave this blessing], 'why should he [Reuben] be granted the rights of the firstborn?' (Deuteronomy 21:17) ["This is Reuben, as it is said, 'Reuben, you are my firstborn' (Genesis 49:3)]. Although I said that his impulsiveness was like water, do not withhold [praise] from him, for 'his bed is on high' (Genesis 49:4). What is 'on high'? When Moses comes, about whom it is written, 'And Moses went up' (Exodus 19:3), he will redeem you. Since Moses stood up and pleaded for him, as it is said, 'May Reuben live and not die' (Deuteronomy 33:6),. The Holy One, blessed be He, said to him, 'He shall live and not die,' [and thus] you [Reuben] are able to take two portions, as it is stated, 'For he [Reuben] should receive a double portion' (Deuteronomy 21:17). 'May Reuben live' - in this world; 'and not die' - in the World to Come. "For he is the beginning of my strength and so on. And it is written, 'my strength and the beginning of my might' (Genesis 49:3). Therefore, the Lord saw that Leah was hated."

“He also consorted with Rachel; he also loved Rachel more than Leah. He worked with him another seven additional years” (Genesis 29:30).
“He also consorted with Rachel; he also loved Rachel more than Leah…” – Rabbi Yehuda bar Simon said: The way of the world is that a worker performs labor faithfully with the employer for two or three hours, but ultimately, he becomes lazy in his labor. However, here, just as the first ones were complete, so, the latter ones were complete. Just as the first ones were performed faithfully, so, the latter ones were performed faithfully.
Rabbi Yoḥanan said: It is written: “Jacob fled to the field of Aram, and Israel worked for a wife…” (Hosea 12:13). He [Hosea] said to them: ‘Your redemption is modeled after your patriarch Jacob. Just as your patriarch Jacob, before he took a wife he was put to work, after he took a wife, he was put to work, you, too, before your redeemer is born, you were enslaved, after your redeemer is born, you are enslaved.’⁵²Even after the redeemer is born the redemption will not be immediate.