Sources from Tanakh
Please forgive the gendered language of many of these translations!
(ח) וְנָתַתִּ֣י לְ֠ךָ וּלְזַרְעֲךָ֨ אַחֲרֶ֜יךָ אֵ֣ת ׀ אֶ֣רֶץ מְגֻרֶ֗יךָ אֵ֚ת כָּל־אֶ֣רֶץ כְּנַ֔עַן לַאֲחֻזַּ֖ת עוֹלָ֑ם וְהָיִ֥יתִי לָהֶ֖ם לֵאלֹהִֽים׃
(8) I assign the land you sojourn in to you and your offspring to come, all the land of Canaan, as an everlasting holding. I will be their God.”
(ג) וְשָׁ֨ב יְהוָ֧ה אֱלֹהֶ֛יךָ אֶת־שְׁבוּתְךָ֖ וְרִחֲמֶ֑ךָ וְשָׁ֗ב וְקִבֶּצְךָ֙ מִכָּל־הָ֣עַמִּ֔ים אֲשֶׁ֧ר הֱפִֽיצְךָ֛ יְהוָ֥ה אֱלֹהֶ֖יךָ שָֽׁמָּה׃ (ד) אִם־יִהְיֶ֥ה נִֽדַּחֲךָ֖ בִּקְצֵ֣ה הַשָּׁמָ֑יִם מִשָּׁ֗ם יְקַבֶּצְךָ֙ יְהוָ֣ה אֱלֹהֶ֔יךָ וּמִשָּׁ֖ם יִקָּחֶֽךָ׃ (ה) וֶהֱבִֽיאֲךָ֞ יְהוָ֣ה אֱלֹהֶ֗יךָ אֶל־הָאָ֛רֶץ אֲשֶׁר־יָרְשׁ֥וּ אֲבֹתֶ֖יךָ וִֽירִשְׁתָּ֑הּ וְהֵיטִֽבְךָ֥ וְהִרְבְּךָ֖ מֵאֲבֹתֶֽיךָ׃
(3) then the LORD your God will restore your fortunes and take you back in love. He will bring you together again from all the peoples where the LORD your God has scattered you. (4) Even if your outcasts are at the ends of the world, from there the LORD your God will gather you, from there He will fetch you. (5) And the LORD your God will bring you to the land that your fathers possessed, and you shall possess it; and He will make you more prosperous and more numerous than your fathers.
What does the Deuteronomic text see happening in the future?
(כג) כֹּֽה־אָמַ֞ר יְהוָ֤ה צְבָאוֹת֙ אֱלֹהֵ֣י יִשְׂרָאֵ֔ל ע֣וֹד יֹאמְר֞וּ אֶת־הַדָּבָ֣ר הַזֶּ֗ה בְּאֶ֤רֶץ יְהוּדָה֙ וּבְעָרָ֔יו בְּשׁוּבִ֖י אֶת־שְׁבוּתָ֑ם יְבָרֶכְךָ֧ יְהוָ֛ה נְוֵה־צֶ֖דֶק הַ֥ר הַקֹּֽדֶשׁ׃
(23) Thus said the LORD of Hosts, the God of Israel: They shall again say this in the land of Judah and in its towns, when I restore their fortunes: “The LORD bless you, Abode of righteousness, O holy mountain!”
Jeremiah is the prophet of Judah when Jerusalem is conquered in 586 BCE and the Am Ha'aretz are exiled from Eretz Yisrael and taken in captivity to Babylon.
Rabbinic Sources
(ב) ישרה אדם בארץ ישראל אפילו בעיר שרובה עובדי כוכבים ולא בחו"ל אפי' בעיר שכולה ישראל מלמד שישיבת ארץ ישראל שקולה כנגד כל מצות שבתורה.
"It's better for a person to live in Israel in a city inhabited mostly by idol worshippers/non-Jews, rather than outside the Land in a city that is completely Jewish. It's taught that living in Israel is equal to all the mitzvot of the Torah."
What is valuable to the rabbis?
(א) בראשית. אמר רבי יצחק לא היה צריך להתחיל [את] התורה אלא (שמות יב ב) מהחודש הזה לכם, שהיא מצוה ראשונה שנצטוו [בה] ישראל, ומה טעם פתח בבראשית, משום כח מעשיו הגיד לעמו לתת להם נחלת גוים (תהלים קיא ו), שאם יאמרו אמות העולם לישראל לסטים אתם, שכבשתם ארצות שבעה גוים, הם אומרים להם כל הארץ של הקדוש ברוך הוא היא, הוא בראה ונתנה לאשר ישר בעיניו, ברצונו נתנה להם וברצונו נטלה מהם ונתנה לנו:
Rabbi Yitzchak said: The Torah could have started from, 'This month shall be to you the first of months' (Exodus 12:2), which is the first mitzvah which Israel was commanded. So what is the reason that it opened with with 'In the beginning'?
Because of [the idea expressed in the verse]: '[God] has declared to His people the power of His works, in order to give them the inheritance of the nations.' (Psalms 111:6). Thus, should the nations of the world say to Israel: 'You are robbers, having conquered the lands of the seven [Canaanite] nations [by force],' [Israel] can say to them: 'The whole earth belongs to the Holy Blessed One; He created it and gave it to whomever He saw fit. By His will He gave it to them, and by His will He took it from them and gave it to us.'
What is Rashi's fear?
ר' זירא הוה קמשתמיט מיניה דרב יהודה דבעא למיסק לארץ ישראל דאמר רב יהודה כל העולה מבבל לארץ ישראל עובר בעשה שנאמר (ירמיהו כז, כב) בבלה יובאו ושמה יהיו עד יום פקדי אותם נאם ה' ורבי זירא ההוא בכלי שרת כתיב
§ The Gemara relates: Rabbi Zeira was avoiding being seen by his teacher, Rav Yehuda, as Rabbi Zeira sought to ascend to Eretz Yisrael and his teacher disapproved. As Rav Yehuda said: Anyone who ascends from Babylonia to Eretz Yisrael transgresses a positive mitzvah, as it is stated: “They shall be taken to Babylonia and there they shall remain until the day that I recall them, said the Lord” (Jeremiah 27:22). Based on that verse, Rav Yehuda held that since the Babylonian exile was imposed by divine decree, permission to leave Babylonia for Eretz Yisrael could be granted only by God. The Gemara asks: And how does Rabbi Zeira interpret that verse? The Gemara answers that Rabbi Zeira maintains that that verse is written about the Temple service vessels, and it does not refer to the Jewish people, as the previous verse states: “Thus says the Lord of Hosts, the God of Israel, concerning the vessels that remain in the house of the Lord” (Jeremiah 27:21). Consequently, Rabbi Zeira sought to ascend to Eretz Yisrael.
Is it permitted for Jews to settle the Land of Israel before the ending of divine decree?
What would Rav Yehuda say will signal the end of the divine decree to avoid Eretz Yisrael?
Modern Text
HaTikvah - The Hope
As long as the Jewish spirit is yearning deep in the heart, With eyes turned toward the East, looking toward Zion, Then our hope - the two-thousand-year-old hope - will not be lost:
To be a free people in our land, The land of Zion and Jerusalem.