וְאִם־יַרְחִ֞יב יְהוָ֤ה אֱלֹהֶ֙יךָ֙ אֶת־גְּבֻ֣לְךָ֔ כַּאֲשֶׁ֥ר נִשְׁבַּ֖ע לַאֲבֹתֶ֑יךָ וְנָ֤תַן לְךָ֙ אֶת־כָּל־הָאָ֔רֶץ אֲשֶׁ֥ר דִּבֶּ֖ר לָתֵ֥ת לַאֲבֹתֶֽיךָ׃
And if the LORD thy God enlarge thy border, as He hath sworn unto thy fathers, and give thee all the land which He promised to give unto thy fathers—
Read halakhic rulings (Jewish law) on Deuteronomy 19:8: and classical halakhic sources.