Leviticus 7:16

16. A vow, or a voluntary offering See Leviticus 7:11, note. Since these were inferior offerings, they were considered less sacred. Hence two days were allowed for eating them. There was little difficulty in this matter where friends were numerous and near. The requirement to eat within one or two days would often induce the offerer to invite the poor to this religious banquet. Theodoret, Clericus, and others, assert that the limit of two days was designed to compel the worshipper to invite the poor to his religious banquet. It is more probable that it is a safeguard against the desecration of holy things.