וַיְצַ֥ו עֲלֵיהֶ֖ם לֵאמֹ֑ר כֹּ֤ה תַעֲשׂוּן֙ בְּיִרְאַ֣ת יְהוָ֔ה בֶּאֱמוּנָ֖ה וּבְלֵבָ֥ב שָׁלֵֽם׃
And he charged them, saying: ‘Thus shall ye do in the fear of the LORD, faithfully, and with a whole heart.
Read midrashic interpretation of II Chronicles 19:9: and classical rabbinic exegesis.