Reference for Menachot 175:13
אמר מר ואת מי אביא תחתיו לא סגיא דלא מעייל כדאמר רבינא גמירי שתי סמיכות בציבור הכא נמי גמירי דשבע מדות של לח היו במקדש
But he who counts the measures from below upwards maintains that the word 'full' implies that it may not be less [than the prescribed measure], but if it is more it is still regarded as 'full'.<span class="x" onmousemove="('comment',' Since the measures were calculated from the smallest they were a little more than the measure they represented; thus the half-log was a little more than two exact quarter-logs, for when pouring two quarter-logs into a large vessel there would be therein more than a half-log by reason of itnu the froth that is formed (Rashi MS.) . Tosaf. s.v. suggest the following interesting interpretation: It is agreed that the term 'full' precludes what is less than the prescribed measure, but as to what is more, he who maintains that the largest measure was given to Moses and was divided up into smaller measures, takes this as a symbol to exclude anything that is more than the measure, but he who maintains that the smallest measure was given to Moses and by increasing it the other measures were arrived at, takes it as a symbol that even what is more than the measure is still regarded as the full measure.');"><sup>11</sup></span>