על החוקים לפרטיהם, ספר ב ל״דOn the Special Laws, Book II 34

א׳
1[215] But besides these we have what is not a feast, but is a general ceremony of a festal character called the Basket, a name which describes what takes place, as we shall shortly shew.  That it has not the prestige and standing of a feast is clear for many reasons. For it does not affect the nation as a united whole like each of the others, nor do we find any victim being brought or led to the altar and then sacrificed and given over to be consumed by the sacred and unquenchable fire, nor is there any specified number of days during which the feast is to last.