Charles Ellicott Commentary Leviticus 19:6

"It shall be eaten the same day ye offer it, and on the morrow: and if aught remain until the third day, it shall be burnt with fire." — Leviticus 19:6 (ASV)

It shall be eaten the same day ... and on the morrow. —The fact that the flesh of the animal might be eaten both on the day on which it was offered and on the following day, according to the authorities during the second Temple, shows that the second class of peace-offering is meant here, described in Leviticus 8:16, since the flesh of the first class of peace-offerings had to be eaten on the same day. .

Until the third day. —See Leviticus 7:17.