Commentaire sur La Genèse 28:9

אחות נביות THE SISTER OF NEBAIOTH — By a logical inference from what is stated that she was “the daughter of Ishmael” would I not know that she was the sister of Nebaioth? But the words are added to tell us that Ishmael died after he had betrothed her to Esau and before her marriage, and that her brother Nebaioth gave her away in marriage And we may learn, also, that Jacob was at that period sixty-three years old For Ishmael was seventy-four years old when Jacob was born — since Ishmael was fourteen years older than Isaac, and Isaac was sixty when they (Jacob and Esau) were born, making seventy-four and his (Ishmael’s) years were one hundred and thirty seven — as it is said (25:17) “And these are the years of Ishmael etc.” — consequently when Ishmael died Jacob was sixty-three years old. We learn from this that he (Jacob) concealed himself in Eber’s School for fourteen years and only after that did he proceed to Haran. For before Joseph’s birth he had stayed in Laban’s house only fourteen years, as it is said (31:41) “I served thee fourteen years for thy two daughters and six years for thy flock”, and he received the sheep as wages only after Joseph was born, for it is said (30:25) “And it came to pass when Rachel had borne Joseph etc. [that Jacob wished to leave Laban and he agreed to remain with him on condition of receiving certain sheep as wages]. Now Joseph was thirty years old when he became ruler in Egypt, and from then until the time that Jacob came down to Egypt was nine years — seven of plenty and two of famine — and Jacob then said to Pharaoh (47:9), “The days of the years of my pilgrimage are a hundred and thirty years”. Go and calculate: the fourteen years he passed with Laban before Joseph’s birth, and the thirty years of Joseph’s life before he became ruler and the nine years from when he became ruler until the time that Jacob came to Egypt make fifty three years from the time he joined Laban until the time he came to Egypt But when he parted from his father he was sixty-three years old, as shown above, so that you have 116 years as his age when he came to Egypt, on the assumption that the fifty-three years he spent with Laban etc. began immediately after he had left his father. But he (Jacob) himself said to Pharaoh, “[I am] one hundred and thirty years”. So you see that fourteen years are missing on this assumption. Thus you learn that after he had received the blessings he concealed himself in Eber’ School for fourteen years (Megillah 17a). But he received no punishment for them (these fourteen years) on account of the merit of having studied the Torah in Eber’s School during that period For Joseph was separated from his father only twenty-two years — that is, from the age of seventeen to that of thirty-nine - corresponding to the twenty-two years during which Jacob was separated from his father and could not perform the duty of honouring him (by actively attending to his needs), viz, the twenty years he spent in Laban's house and the two years he passed in travelling home - for it is written (33:17) with regard to his journey homewards, "And Jacob built him a house and made booths for his cattle", and our Rabbis, of blessed memory, inferred (Megillah 17a) from this verse that during his travels he passed eighteen months at Succoth, since a house means a dwelling for the rainy season, and "booths" means for the summer time. And this statement that the study of the Torah protects one from punishment fits in with the calculation which we made above, based upon the Sacred Text, regarding the period from when he left his father until the time when he went down to Egypt at the age of 130 years, where we found a surplus of 14 years, so that he must have been absent from his father for 36 years. But we may regard it as certain that when on his journey to Laban he concealed himself in Eber's house it was for the purpose of studying the Torah with him and that because of the merit of studying the Torah he received no punishment for them (those fourteen years) so that Joseph was separated from him only twenty-two years "measure for measure"(Megillah 17a). Thus far (beginning at "But he received no punishment") is found in an old Rashi text.

אחות נביות, seeing that Nevayot was the oldest of Ishmael’s children the Torah calls Machalat “the sister of Nevayot,” (instead of merely “the daughter of Ishmael”). We find something parallel to this in Exodus 15,20 ותקח מרים הנביאה אחות אהרן, “Miriam the prophetess, sister of Aaron, took, etc.” The reason she is referred to in that fashion is that she was older than Moses but younger than Aaron. On the other hand, in a verse where both Moses and Aaron are mentioned together with Miriam, (Exodus Numbers 26,59) she is referred to as “their sister.” The Torah employs the same formulation in Genesis 36,22 where Timna is described as the sister of Lotan, seeing that Lotan was the oldest of his brothers as we know from verse 20 in that chapter, i.e. לוטן, ושובל, וצבעון, וענה.

וילך...אחות נביות. This Nevayot was an extremely well known personality, and so was his sister. (25,20) Compare also the formulation in Genesis 10,21 which shows that Yaphet was a well known personality.