אָז֩ תִּרְצֶ֨ה הָאָ֜רֶץ אֶת־שַׁבְּתֹתֶ֗יהָ כֹּ֚ל יְמֵ֣י הֳשַׁמָּ֔ה וְאַתֶּ֖ם בְּאֶ֣רֶץ אֹיְבֵיכֶ֑ם אָ֚ז תִּשְׁבַּ֣ת הָאָ֔רֶץ וְהִרְצָ֖ת אֶת־שַׁבְּתֹתֶֽיהָ׃
Then shall the land be paid her sabbaths, as long as it lieth desolate, and ye are in your enemies’land; even then shall the land rest, and repay her sabbaths.
Read halakhic rulings (Jewish law) on Leviticus 26:34: and classical halakhic sources.