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It seems as if the woman knew Jesus would soon die, but the disciples were caught completely off guard. If even the disciples were caught off-guard, how did she know what was going to happen?
Matthew 26:6 - 13
NLT - 6 Meanwhile, Jesus was in Bethany at the home of Simon, a man who had previously had leprosy. 7 While he was eating, a woman came in with a beautiful alabaster jar of expensive perfume and poured it over his head.
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