מדרש אויף בראשית 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)

“Leah became pregnant again and gave birth to a sixth son to Jacob” (Genesis 30:19).
“Leah said: God has granted me a fine gift; now my husband will reside with me, because I bore him six sons. She called his name Zebulun” (Genesis 30:20).
“Leah said: God has granted me a fine gift” – this field, as long as you fertilize it and hoe it, it produces produce.
“Then she bore a daughter, and she called her name Dina” (Genesis 30:21).
“Then she bore a daughter” – it is taught:¹²This is a baraita. How so? One whose wife was pregnant, and he says: ‘May it be God’s will that my wife will give birth to a male,’ it is a vain prayer. The school of Rabbi Yanai said: This baraita is when she is sitting on the travailing chair. Rabbi Yehuda ben Pazi said: Even for one sitting on the travailing chair, it can change. That is what is written: “House of Israel, can I not do to you like this potter? [The utterance of the Lord]. Behold, like the clay in the hand of the potter, so you are in My hand, house of Israel” (Jeremiah 18:6). Just as this potter, who formed the jug, breaks it and crafts another, I, too, can do so, even on the travailing chair.
He¹³Rabbi Yehuda ben Pazi. raised an objection: But is it not written: “Then she bore a daughter”?¹⁴Only at the birth it was a daughter, but not before. He said to him: Its primary creation was male, but due to Rachel’s prayer: “May the Lord add another son for me” (Genesis 30:24) – it became a female.¹⁵At an early stage in the pregnancy.
Rabbi Ḥanina ben Pazi said: The matriarchs were prophets, and Rachel was one of the matriarchs. “May the Lord add other sons for me” is not written here, but rather, “another son.” She said: ‘He is destined to produce one more; if only it will be from me.’
Rabbi Ḥanina said: All the matriarchs gathered and said: ‘We have enough [dayenu]¹⁶This is expounded from the name Dina. The letters of Dina are: dalet, yod, nun, heh. The letter of dayenu are dalet, yod, nun, vav. males. Remember this one again.’