1 Cor 14:4 establishes that tongues edify self, prophecy edifies church—the principle behind Paul's choice in v19.

1 Cor 14:21 quotes Isaiah to show tongues are a sign for unbelievers—reinforcing why Paul prefers intelligible words for the church.

1 Cor 14:22 explicitly states tongues are for unbelievers, prophecy for believers—the rationale for Paul's preference in v19.

1 Cor 14:9 argues that unintelligible speech is useless—the logical basis for Paul's preference for five clear words.

1 Cor 14:14 explains that praying in a tongue leaves the mind unfruitful—the reason Paul prioritizes words with understanding.

In 1 Corinthians 14:15, Paul also balances spirit and mind — showing his consistent priority of intelligible prayer and song for edification.

In 1 Corinthians 14:31, prophecy aims so 'all may learn' — same goal as Paul's five intelligible words for instruction here.

1 Cor 12:7 states gifts are for the common good—the core reason Paul chooses intelligible words over tongues in v19.

Ephesians 4:29 commands speech that builds up — directly parallels Paul's desire for words that instruct others in church.