וְאִשְּׁר֥וּ אֶתְכֶ֖ם כָּל־הַגּוֹיִ֑ם כִּֽי־תִהְי֤וּ אַתֶּם֙ אֶ֣רֶץ חֵ֔פֶץ אָמַ֖ר יְהוָ֥ה צְבָאֽוֹת׃ (ס)
And all nations shall call you happy; For ye shall be a delightsome land, Saith the LORD of hosts.
Read halakhic rulings (Jewish law) on Malachi 3:12: and classical halakhic sources.