Reference for Yoma 159:11
א"ר יוחנן שיעורין ועונשין הלכה למשה מסיני עונשין מכתב כתיבי אלא ה"ק (אמר רבי יוחנן) שיעורים של עונשין הלכה למשה מסיני
i.e. only he who repents when he finds out his transgression must bring a sacrifice, because of his error, but he who does not repent when he finds out his transgression, does not bring a sacrifice for his error.<span class="x" onmousemove="('comment',' As he became conscious of his transgression, the new enactment was still unknown, the quantity of a small olive to him, hence, was below the minimum required for a transgression to be constituted, hence he has not 'found out his transgression', and is not required to offer up a sacrifice in atonement of his sin.');"><sup>15</sup></span> Rather, therefore, must ['increase the measures'] signify that they would declare a sacrifice obligatory only when he had eaten a quantity as large as a large olive.