Midrash sa Ruth 4:15: Ruth Rabbah & Midrash Tanchuma

“He will be for you a restorer of life, and nourisher of your old age, as your daughter-in-law, who loves you, who is better to you than seven sons, has borne him” (Ruth 4:15).
“He will be for you a restorer of life, and nourisher of your old age...[who is better to you than seven sons].” Rabbi Yehuda and Rabbi Neḥemya, Rabbi Yehuda says: Than the seven patrilineal heads mentioned later: “Otzem the sixth, David the seventh” (I Chronicles 2:15).²⁵⁷The reference is to the seven sons of Yishai. Rabbi Neḥemya said: Than the seven who are specified here: Peretz, Ḥetzron, Ram, Aminadav, Naḥshon, Salmon, Boaz.

And Moses went, and returned unto Jethro his father-in-law. Prior to this is written: And when the Lord saw that he returned to see … and He said: “Moses, Moses” (Exod. 3:4). R. Abba the son of Kahana said: Everyone whose name is repeated in immediate succession experiences life in both worlds: Noah, Noah (Gen. 6:9); Abraham, Abraham (ibid. 22:11); Jacob, Jacob (ibid. 46:2); Moses, Moses (Exod. 3:4); Samuel, Samuel (I Sam. 3:10); Perez, Perez (Ruth 4:15). However, someone retorted: Is it not also written: These are the generations of Terah, Terah (Gen. 11:27). He replied: Even he had a portion in both worlds, for our patriarch Abraham was not buried until he was assured that his father, Terah, had repented, for it is said: But thou shalt go to thy fathers in peace (ibid. 15:15). Abraham said to the Holy One, blessed be He: Master of the Universe: Shall I go to my fathers, though I have stored up good deeds in this world? The Holy One, blessed be He, answered: Be assured: Thy father hath repented. Hence his name was repeated.