Reference for Moed Katan 30:4

ת"ש מנודה שונה ושונין לו נשכר ונשכרין לו שמע מינה מצורע מהו בעשיית מלאכה תיקו

Come and hear: 'One "separated" [under a ban] teaches [others] and others teach him; he is hired [for work] and others are hired by him'.<span class="x" onmousemove="('comment',' V. supra 15a.');">⁵</span> You may infer from that. What about a leper engaging in work? - Let this stand [adjourned].

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