Proverbs 10:18 links concealed hatred to lying lips, mirroring the fervent lips hiding an evil heart.

Proverbs 27:6 contrasts faithful wounds with deceitful kisses, similarly exposing insincere affection; a complementary proverb.

In 2 Samuel 20:9, Joab's friendly greeting and kiss mask his intent to kill — a vivid example of fervent lips with evil heart.

In 2 Samuel 20:10, Joab strikes Amasa after the deceitful kiss, exposing the murderous heart behind the lips.

In Luke 22:47, Judas approaches Jesus with a kiss — fervent lips hiding betrayal — fulfilling the proverb's pattern.

Luke 22:48 has Jesus asking if Judas betrays with a kiss, highlighting the deception of fervent lips with evil heart.

Ezra 4:2 shows Samaritans offering to help with insincere motives, mirroring the 'fervent lips with evil heart' proverb.

Psalm 28:3 explicitly describes those who 'speak peace to neighbors while evil is in hearts' — a direct parallel.

Jeremiah 41:1 tells of Ishmael coming to eat with Gedaliah while plotting murder — a narrative example of deceptive friendliness.

Jeremiah 41:6 shows Ishmael weeping falsely and inviting victims — a direct display of fervent lips hiding evil.

Daniel 11:27 describes two kings sitting together, lying with evil hearts — a direct parallel to the proverb's imagery.

Ezekiel 33:31 describes people with lustful talk and hearts set on gain — they speak well but are inwardly corrupt.