Reference for Menachot 152:6

שתי הלחם שתי עשרונות משלש סאין כיון דמחיטין אתיין אף על גב דמחדש אתיין שתי עשרונות אתו משלש סאין

<big><b>MISHNAH: </b></big>THE 'OMER CONSISTED OF ONE TENTH [OF AN EPHAH OF FLOUR] TAKEN FROM THREE SE'AHS;<span class="x" onmousemove="('comment',' In order to obtain one tenth of an ephah of the finest flour one whole ephah (three se'ahs equal one ephah) of barley was reaped, which was ground, sifted and resifted until reduced to a tenth. V. supra 63b.');">⁵</span> THE TWO LOAVES CONSISTED OF TWO TENTHS TAKEN FROM THREE SE'AHS; AND THE SHEWBREAD CONSISTED OF TWENTY-FOUR TENTHS TAKEN FROM TWENTY-FOUR SE'AHS.

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