וְעַתָּ֗ה אִם־שָׁמ֤וֹעַ תִּשְׁמְעוּ֙ בְּקֹלִ֔י וּשְׁמַרְתֶּ֖ם אֶת־בְּרִיתִ֑י וִהְיִ֨יתֶם לִ֤י סְגֻלָּה֙ מִכָּל־הָ֣עַמִּ֔ים כִּי־לִ֖י כָּל־הָאָֽרֶץ׃
세계가 다 내게 속하였나니 너희가 내 말을 잘 듣고 내 언약을 지키면 너희는 열국 중에서 내 소유가 되겠고
Midrash Tanchuma
The Holy One, blessed be He, however, befriended Israel and called them his possessions, inheritance, (and) portion, as it is said: For the portion of the Lord is His people Jacob, the lot of His inheritance (Deut. 32:9); and ye shall be Mine own treasure among all the peoples (Exod. 19:5); and I have planted thee a noble vine, wholly a right seed (Jer. 2:21). Why did the Holy One, blessed be He, concern Himself from the very beginning of time with the genealogies of the nations? This may be likened to a king who dropped a pearl into sand and pebbles. The king was compelled to search the sand and the pebbles to recover the pearl. As soon as he recovered the pearl, however, he discarded the sand and the pebbles, for he was only interested in retrieving the pearl.
Otzar Midrashim
10) Blessed be the name of the Holy Blessed One who created seven heavens and seven earths and seven seas, and hung them on His mighty arm, as it is written, "And below the arms of the universe" (Deuteronomy 33:27). And the Holy Blessed One only created any of them for the sake of the Torah and so Israel would receive it. And He also created seven nations, and corresponding to them seven princes over them. And He also created Israel, one nation on earth. And when the angels saw Israel they quarreled with each other. One said "Israel will be in my portion!" and one said "Israel will be in my portion!" And when the Holy Blessed One saw this, He said to them, "Cast lots for My people Israel, and for whomsoever the lot falls it will be his." And thus they did, they cast lots, and the lot of the Holy Blessed One fell over Israel, and they set them before Him, as it written, "Borders delightful fell to Me; My inheritance is so lovely!" (Psalm 16:6) And the Holy Blessed One chose them and called them treasured, as it is said, "And you will be treasured over all the peoples, though Mine is all the earth" (Exodus 19:5).
Vayikra Rabbah
“Is [Ephraim] a precious son to Me [li]”? Wherever [the term] li is stated, it never changes, not in this world and not in the World to Come. Regarding priests it is written: “They shall serve as priests to Me [li]” (Exodus 40:15). Regarding Levites it is written: “The Levites shall be Mine [li]” (Numbers 8:14). Regarding Israel it is written: “For the children of Israel are Mine [li]” (Leviticus 25:55). Regarding gifts it is written: “They shall take [gifts] for Me [li]” (Exodus 25:2). Regarding the firstborn it is written: “For every firstborn is Mine [li]” (Numbers 3:13). Regarding the Sanhedrin it is written: “Gather to Me [li] seventy men from the elders of Israel” (Numbers 11:16). Regarding the Land of Israel: “For all the land is Mine [li]” (Exodus 19:5). Regarding Jerusalem: “The city that I have chosen for Me [li]” (I Kings 11:36). Regarding the royal House of David: “For I have seen a king for Me [li] among his sons” (I Samuel 16:1). Regarding the Temple: “They shall craft a Sanctuary for Me [li]” (Exodus 25:8). Regarding the altar: “You shall craft an altar of earth for Me [li]” (Exodus 20:21). Regarding offerings: “You shall be diligent to sacrifice to Me [li]” (Numbers 28:2). Regarding the anointing oil: “This shall be oil of sacred anointment for Me [li]” (Exodus 30:31). That is, every place that li is stated, it never changes, not in this world and not in the World to Come.