In 2 Corinthians 1:23, Paul calls God as witness to his sincerity — reinforcing his earlier claim of a trustworthy word.

2 Corinthians 1:17 raises the accusation of vacillation that Paul answers in 1:18 by appealing to God's faithfulness.

In 2 Corinthians 11:31, Paul again invokes God's knowledge of his truthfulness — echoing the same appeal to God's faithfulness.

In 2 Corinthians 6:7, Paul includes 'truthful speech' among his commendations — consistent with his claim of not speaking with Yes and No.

In 2 Corinthians 7:14, Paul insists his boasting was true, mirroring the truthfulness he asserts in 1:18.

In 2 Corinthians 12:6, Paul says 'I will be speaking the truth' when boasting — a further instance of his commitment to truthful speech.

In Revelation 3:14, Christ is called 'the Faithful and True Witness' — directly echoing the attribute Paul ascribes to God.

In Deuteronomy 7:9, God is called 'the faithful God' — providing the Old Testament foundation for Paul's statement.

In Romans 3:4, Paul declares 'Let God be true though every man a liar' — the same conviction that God's faithfulness validates all speech.

In John 3:33, receiving Christ's testimony seals that God is true — echoing Paul's grounding of his word in God's faithfulness.