ISB ~ 1 Corinthians 14 v21

the law:Refers to the entire OT, not just the Pentateuch (Jn 10:34; 15:25). • Paul paraphrases Is 28:11-12, where the scoffers of Israel mock Isaiah by comparing his prophecies to the unintelligible babble of infants. Isaiah turns their mockery into a warning by saying that Yahweh will rouse foreign armies (Assyria), who speak an alien language, to seek and destroy them (Deut 28:49). This leads Paul to see “tongues” as a “sign” of the judgment that will fall upon sinners (1 Cor 14:22).