Jeremiah 22:16 - Ellicott's Commentary On The Whole Bible

Was not this to know me? — The prophet, as a true witness of the law of righteousness, proclaims that the religious fame of Josiah rested not on his restoration of the Temple worship, nor on his suppression of idolatry, but much more on his faithfulness in his kingly work to the cause of righteousness and mercy. They only could know Him who, in this respect, strove to be like Him (1 John 3:2).