Isaiah 11:3 New English Translation

³He will take delight in obeying the Lord.^[a]
He will not judge by mere appearances,^[b]
or make decisions on the basis of hearsay.^[c]

Isaiah 11:3 tn The Hebrew text reads literally, “and his smelling is in the fear of the Lord.” In Amos 5:21 the Hiphil of רוּחַ (ruakh, “smell”) carries the nuance of “smell with delight, get pleasure from.” There the Lord declares that he does not “smell with delight” (i.e., get pleasure from) Israel’s religious assemblies, which probably stand by metonymy for the incense offered during these festivals. In Isa 11:3 there is no sacrificial context to suggest such a use, but it is possible that “the fear of the Lord” is likened to incense. This coming king will get the same kind of delight from obeying (fearing) the Lord, as a deity does in the incense offered by worshipers. Some regard such an explanation as strained in this context, and prefer to omit this line from the text as a virtual dittograph of the preceding statement.
Isaiah 11:3 tn Heb “by what appears to his eyes”; KJV “after the sight of his eyes”; NIV “by what he sees with his eyes.”
Isaiah 11:3 tn Heb “by what is heard by his ears”; NRSV “by what his ears hear.”

New English Translation (NET)