Ezekiel 36:37

³⁷ Thus saith the Lord GOD; I will yet for this be inquired of by the house of Israel, to do it for them; I will increase them with men like a flock.

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.

³ One called to another, and said, "Holy, holy, holy, is Yahweh of Armies! The whole earth is full of his glory!"