מִצְוַ֣ת שְׂ֭פָתָיו וְלֹ֣א אָמִ֑ישׁ מֵ֝חֻקִּ֗י צָפַ֥נְתִּי אִמְרֵי־פִֽיו׃
I have not gone back from the commandment of His lips; I have treasured up the words of His mouth more than my necessary food.
Read kabbalistic (mystical) interpretation of Job 23:12: and classical mystical sources.