Ezekiel 3:12

¹² And lift me up doth a spirit, and I hear behind me a noise, a great rushing -- `Blessed [is] the honour of Jehovah from His place!' --

Lip

'A lip' in general signifies doctrine.

In Isaiah 6:3, 7, this signifies the interior parts of a person and thus internal worship where adoration is grounded.

In Isaiah 37:29, this signifies the thought of the understanding

In Malachi 2:6, 7, this denotes doctrine grounded in charity.

⁷ For the priest's lips should keep knowledge, and they should seek the law at his mouth; for he is the messenger of Yahweh of Armies.