Midrasch zu Bereschit 30:20

Behold, I send an angel before thee, to keep thee (Exod. 23:20). Scripture says elsewhere in reference to this verse: But I said: “How would I put thee among the sons, and give thee a pleasant land, the goodliest inheritance of the nations!” And I said: “Thou shalt call Me, My father, and shall not turn away from following Me” (Jer. 3:19). How would I put thee among the sons. R. Eleazar the son of Pedat stated: The expression put thee is employed to indicate “to be set apart.” The Holy One, blessed be He, said: It is my opinion that you and I must be together in this world, since I am the Father and you are My son. Why, then, do you allow other nations to come between us? Hence I would put thee is an expression that indicates “to set apart,” as in the verse: And put his own droves apart (Gen. 30:40).

“He seats the barren woman of the house as a happy mother of children. Hallelujah!” (Psalms 113:9) There are seven barren women: Sarah, Rivka, Rachel and Leah, Manoach’s wife, Chana and Zion…Another explanation. ‘He seats the barren woman’ this refers to Zion. “Sing you barren woman who has not borne…” (Isaiah 54:1) ‘a happy mother of children,’ “And you shall say to yourself, Who begot these for me…” (Isaiah 49:21)