Genesis 25:20

And Izhak was the son of forty years when he took Rivekah, the daughter of Bethuel the Aramite, who was of Padan Aram, the sister of Laban the Aramite, unto him for a wife.

בן ארבעים שנה, he is described as 60 years old when the twins Esau and Yaakov were born to him by Rivkah. (verse 28) From the combination of these two verses we know that Rivkah had remained barren for 20 years.

אחות לבן הארמי, and from her emerged Esau who was similar in character to the brother of his mother.

ויהי יצחק, the verse tells us that G’d intervened benevolently in Yitzchok‘s life just as He had done in the life of his father; Rivkah too was barren, unable to conceive children unless through a miracle. The fact is proven when we consider that Yitzchok married her at 40 and until he was sixty he could not father a child. G’d had deliberately intervened in the bodies of our matriarchs in order to demonstrate to the nations of the world that He loved Avraham and Yitzchok and therefore He performed miracles to enable their wives to bear children for them. Our sages in Yevamot 64 conclude from the above that G’d so looked forward to the prayers of the patriarchs that He quasi provoked them into praying for the gift of children.

מפדן ארם, from the fields of Aram. Padan Aram is referred to as the field of Aram in Hoseah 12,13. Also in Arabic, the place is known as “the field of Padan.” Alternatively, according to Bab Kama 96, it is possible that the word פדן describes a pair of something, such as a pair of oxen being referred to in the Talmud as פדנא דתורי. There were two countries [according to our author. Ed.] both of which straddle the river Euphrates, one being Aram Tzova, the other Aram Naharayim. This is why each is described as if it were a pair. We know of other “Arams” that are “pairs,” such as ארם דמשק and ארם בית רחב, (Samuel II 10,6). Seeing these localities were each very close to the other they are referred to as if they were twin cities, pairs. It appears that פדן ארם was part of the land known as אור כשדים, whereas ארם נהרים was part of the region known as חרן.

אחות לבן הארמי, because the family was known through him and he conducted the affairs of that house, as we have explained at the time.

ויהי יצחק בן ארבעים שנה, Yitzchok was forty years old, etc.” According to Rashi, the forty year old Yitzchok married a three year old Rivkah. This is difficult as we have learned from the Sifri that there were three people who reached the same age, i.e. Kehat, Ben Azzai and Rivkah, and the Torah stated that Kehat died at the age of one hundred and thirty three. (Exodus 6,18.) If this were correct she must have been eleven years older than three when she married Yitzchok. [There is no Sifri on the Book of Genesis, but the Midrash hagadol, which originated in Yemen, also claims that Rivkah was 14 years old when she married Yitzchok. Ed.] Rashi’s calculation goes as follows: Rivkah was married at 3 years, and was 23 years old when she gave birth to Esau and Yaakov. Yaakov was 63 years old when he fled to Padan Aram as Rashi explains at the end of this portion. He then spent 14 years in the academy headed by Ever, great grandson of Noach. After that he worked 20 years for his uncle Lavan. He spent 2 years on his return journey home during which time he was informed by Rivkah’s nursemaid that his mother had died, as Rashi explains at the end of parshat Vayishlach, in connection with the burial of that nursemaid called Devorah, and the naming of an oak tree after her. According to this calculation, Rivkah could not have lived to an age older than 123 years. This is also the opinion of Rabbi Yehudah according to whom Rivkah must have been 14 years old when she got married. If you accept that view, Rivkah died at the age of 133. According to this calculation, what we read in seder olam, chapter 1, that Avraham was informed about the birth of Rivkah while on the way home from the binding of Yitzchok, she must have been 11 years old already at that time. This is what bothered Rabbi Moshe Shlomoh ben Avraham known by the acrostic אנסימא"ן, when discussing that a virgin is given 12 month between betrothal and consummation of the marriage (Talmud tractate Ketuvot, folio 57) The Talmud there derives this from the words in our portion, when Rivkah’s family demanded 12 months delay from Eliezer before Rivkah going with him. If Rivkah had been 14 years old already, she would have been considered an adult, and her father would not have had the right to tell her what to do (unless she still continued to live in his house) The Talmud there gives a girl who is over twelve and a half years old at betrothal only thirty days before becoming wed to her fiance, just as the length of time required before a widow can remarry. Our author leaves the question open, not having heard how to reconcile these data to the satisfaction of all scholars.