Ezekiel 3:17

¹⁷ that there is a word of Jehovah unto me, saying, `Son of man, a watchman I have given thee to the house of Israel, and thou hast heard from My mouth a word, and hast warned them from Me.

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.

³⁰ And thou, son of man, the sons of thy people who are speaking about thee, By the walls, and in openings of the houses, Have spoken one with another, each with his brother, Saying: Come in, I pray you, And hear what [is] the word that cometh out from Jehovah.