Reference for Zevachim 110:6

פשיטא מוגף כנעול דמי וילון מאי א"ר זירא הוא עצמו אין נעשה אלא כפתח פתוח

[if it is slaughtered] before the Levites set up the Tabernacle or after the Levites take down the Tabernacle, it is invalid. It is obvious that if it is shut, it is as though it were locked.<span class="x" onmousemove="('comment',' The sacrifice then is certainly invalid.');">⁶</span>

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