Reference for Arakhin 54:37
בעל הבית אומר בסלע ואחד אומר בסלע ואיסר של סלע ואיסר קודם מפני שמוסיף על הקרן
bid a sela' and another bid a sela' and an issar, he who bid a sela' and an issar has preference, since he adds to the principal value'? - Here where the fifth is the profit of the Sanctuary, the fifth has preference, but there, where the fifth is the profit<span class="x" onmousemove="('comment',' In the case of the second tithe, both the original sum and the added fifth remain the possession of the householder, the only restriction upon him being the obligation to consume the whole sum in Jerusalem, after having redeemed the second tithe in the country. In that case we allow the preference to a bidder who goes, by even one issar, above the bid of the householder, even though the householder adds one fifth, since that fifth as well as the whole sum, remains his private property the Sanctuary's interest not being involved at all. But when the consecrated field is to be redeemed, the fifth added by the owner is the profit of the Sanctuary, both the original amount and the addition being received by its treasurer, therefore the preference is with him who offered the additional fifth.');"><sup>8</sup></span>