Ezekiel 2:10

¹⁰ and He spreadeth it before me, and it is written in front and behind, and written on it [are] lamentations, and mourning, and wo!

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.

¹⁸ In that day, there will be five cities in the land of Egypt that speak the language of Canaan, and swear to Yahweh of Armies. One will be called "The city of destruction."