הַיּ֣וֹם הַזֶּ֗ה יְהוָ֨ה אֱלֹהֶ֜יךָ מְצַוְּךָ֧ לַעֲשׂ֛וֹת אֶת־הַחֻקִּ֥ים הָאֵ֖לֶּה וְאֶת־הַמִּשְׁפָּטִ֑ים וְשָׁמַרְתָּ֤ וְעָשִׂ֙יתָ֙ אוֹתָ֔ם בְּכָל־לְבָבְךָ֖ וּבְכָל־נַפְשֶֽׁךָ׃
This day the LORD thy God commandeth thee to do these statutes and ordinances; thou shalt therefore observe and do them with all thy heart, and with all thy soul.
Read halakhic rulings (Jewish law) on Deuteronomy 26:16: and classical halakhic sources.