2 Chronicles 28:20 describes King Ahaz trusting Assyria, who distressed him—an example of trusting an unfaithful ally in trouble as in Proverbs 25:19.

2 Chronicles 28:21 continues the account—Ahaz's tribute to Assyria did not help, illustrating the futility of trusting the unfaithful.

Isaiah 30:1-3 condemns trusting Egypt instead of God, a parallel to relying on an unfaithful man in trouble.

Isaiah 36:6 uses the 'broken reed' metaphor for Egypt, echoing the bad tooth/foot image of unreliable support.

Ezekiel 29:6 calls Egypt a 'staff of reed' to Israel, reinforcing the theme of treacherous allies.

Ezekiel 29:7 describes how Egypt's support failed and injured those who leaned on it, same warning.

Acts 15:38 records Paul refusing to take John Mark due to past desertion, illustrating why to avoid untrustworthy people.

2 Timothy 4:16 shows Paul abandoned by friends at his defense—a real instance of unfaithful support in crisis.