Reference for Bekhorot 106:39

הא כתיב (דברים יד, כב) עשר תעשר ומה ראית

That he is liable of transgressing on their account [the negative precepts of]: 'It shall not be sold', and 'It shall not be redeemed'.<span class="x" onmousemove="('comment',' Lev. XXVII, 28, for peace-offerings are fit to be redeemed.');">²⁹</span>

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