וְעָשִׂ֛יתָ הַיָּשָׁ֥ר וְהַטּ֖וֹב בְּעֵינֵ֣י יְהוָ֑ה לְמַ֙עַן֙ יִ֣יטַב לָ֔ךְ וּבָ֗אתָ וְיָֽרַשְׁתָּ֙ אֶת־הָאָ֣רֶץ הַטֹּבָ֔ה אֲשֶׁר־נִשְׁבַּ֥ע יְהוָ֖ה לַאֲבֹתֶֽיךָ׃
And thou shalt do that which is right and good in the sight of the LORD; that it may be well with thee, and that thou mayest go in and possess the good land which the LORD swore unto thy fathers,
Find Mishnaic references to Deuteronomy 6:18: passages from the 63 tractates of the Mishnah that cite or discuss this verse, free.