'To babble on' (Matthew 6:7) — a word found almost nowhere before this verse, quite possibly built to sound like what it means (batta-batta…), and glossed by the next phrase: 'their many words.' KJV 'use not vain repetitions.' The target is pagan-style prayer as word-count — 'your Father knows what you need before you ask him.' → first discussed at Matt 6:7