Eder - The tower of the flock was probably a watch-tower where shepherds guarded their flocks by night. It was a mile (Jerome) or more south of Bethlehem. Here Reuben was guilty of the shameful deed which came to the knowledge of his father, and occasions the allusion in Genesis 49:4. He was by this act degraded from his position in the holy family. The division of the open parashah in the text here is more in accordance with the sense than that of the verse.

Tower of Edar - Literally, the tower of the flock, and so translated Micah 4:8. It is supposed that this tower was about a mile from Bethlehem, and to have been the place where the angels appeared to the shepherds. The Targum of Jonathan expressly says: "It is the place in which the King Messiah shall be manifested in the end of days." By the tower of the flock we may understand a place built by the shepherds near to some well, for the convenience of watering their flocks, and keeping watch over them by night.

And Israel journeyed,.... Having stayed near Bethlehem, as it is said, about two months (h); this is the first time Jacob is by Moses called Israel, after this name, was given him; the reason of which the Jews say is, because he bore the death of Rachel with so much patience:

and spread his tent beyond the tower of Eder; which was a place of pasturage, and fit for his flocks, see Micah 4:8; it was about a mile from Bethlehem to the south (i), and is supposed to be the place where the shepherds were watching their flocks, when the angel reported to them the birth of Christ, Luke 2:8; pretty remarkable are the words added here in the Targum of Jonathan,"the place from whence the King Messiah will be revealed in the end of days.''

(h) Shalshalet Hakabala, fol. 5. 2.((i) Bunting's Travels, p. 76.

Genesis 35:21-22

Reuben's Incest. - As they travelled onward, Jacob pitched his tent on the other side of Migdal Eder, where Reuben committed incest with Bilhah, his father's concubine. It is merely alluded to her in the passing remark that Israel heard it, by way of preparation for Genesis 49:4. Migdal Eder (flock-tower) was a watch-tower built for the protection of flocks against robbers (cf. 2 Kings 18:8; 2 Chronicles 26:10; 2 Chronicles 27:4) on the other side of Bethlehem, but hardly within 1000 paces of the town, where it has been placed by tradition since the time of Jerome. The piska in the middle of Genesis 35:22 does not indicate a gap in the text, but the conclusion of a parashah, a division of the text of greater antiquity and greater correctness than the Masoretic division.

And Israel journeyed, and spread his tent beyond the tower of Edar.

35:21 Israel, a prince with God, yet dwells in tents; the city is reserved for him in the other world.

35:21-29 What a sore affliction Reuben's sin was, is shown, and Israel heard it. No more is said, but that is enough. Reuben thought that his father would never hear of it; but those that promise themselves secrecy in sin, are generally disappointed. The age and death of Isaac are recorded, though he died not till after Joseph was sold into Egypt. Isaac lived about forty years after he had made his will, chap. 27:2. We shall not die an hour the sooner, but much the better, for timely setting our hearts and houses in order. Particular notice is taken of the agreement of Esau and Jacob at their father's funeral, to show how God had wonderfully changed Esau's mind. It is awful to behold relations, sometimes for a little of this world's goods, disputing over the graves of their friends, while they are near going to the grave themselves.