Commentaries:
Robertson's Word Pictures (NT)
To the multitude that went out (toiv ecporeuomenoiv oxloiv). Plural,
Multitudes. The present participle also notes the repetition of the crowds as does elegen (imperfect), he used to say. Matthew 3:7-10 singles out the message of John to the Pharisees and Sadducees, which see for discussion of details. Luke gives a summary of his preaching to the crowds with special replies to these inquiries: the multitudes, Luke 3:10-11, the publicans Luke 3:12-13, the soldiers Luke 3:14.
To be baptized of him (baptisqhnai up autou). This is the purpose of their coming. Matthew 3:7 has simply "to his baptism." John's metaphors are from the wilderness (vipers, fruits, axe, slave boy loosing sandals, fire, fan, thrashing-floor, garner, chaff, stones).
Who warned you? (tiv epedeicen umin). The verb is like our "suggest" by proof to eye, ear, or brain (Luke 6:47; Luke 12:5; Acts 9:16; Acts 20:35; Matthew 3:7). Nowhere else in the N.T. though common ancient word (upodeiknumi, show under, point out, give a tip or private hint).
Other commentary entries containing this verse:
Luke 3:10
John 1:19
John 1:40
John 4:1
Acts 9:16
Acts 28:3
Galatians 3:7
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