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.
(Referencat: Arcana Coelestia 1284, Arcana Coelestia 1288)
Luke 12:46
46
the lord of that servant will come in a day in which he doth not look for [him], and in an hour that he doth not know, and will cut him off, and his portion with the unfaithful he will appoint.