Reference for Moed Katan 31:9

ומנלן דמפקרינן נכסיה דכתיב (עזרא י, ח) וכל אשר לא יבא לשלשת הימים בעצת השרים והזקנים יחרם כל רכושו והוא יבדל מקהל הגולה

- Front the [same] text: Curse ye a cursing.<span class="x" onmousemove="('comment',' I.e., a repeated cursing (of the defiant sinner) .');">¹⁶</span> Whence do we derive that [it falls on one who] eats and drinks with the offender or stands within four cubits of him? - From the same text: [Curse ye a cursing] the inhabitants thereof.<span class="x" onmousemove="('comment',' Cf. Judg. V, 23.');">¹⁷</span> Whence do we derive that we publish the details of his offence? - From the [same] text: Because they [the denizens of Meroz] came not to the help of the Lord.

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