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12 And having groaned in the Spirit of His, He says, "Why does the generation, this one, seek a sign? Amen I say to you, if* a sign will be given to the generation, this one!"
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Notes
v.12 The Greek text is consistent with how a divine oath is recorded in Psalm 95:11 in Hebrew and Greek. For explanation, see Thayer's Greek Lexicon, "εἰ" section 5 (link).