It shall be eaten
'akal (aw-kal')
to eat -- at all, burn up, consume, devour(-er, up), dine, eat(-er, up), feed (with), food, freely, in...wise(-deed, plenty), (lay) meat, quite.
the same day
yowm (yome)
a day (as the warm hours),
ye offer
zebach (zeh'-bakh)
a slaughter, i.e. the flesh of an animal; by implication, a sacrifice (the victim or the act) -- offer(-ing), sacrifice.
it and on the morrow
mochorath (mokh-or-awth')
the morrow or (adverbially) tomorrow -- morrow, next day.
and if ought remain
yathar (yaw-thar')
to jut over or exceed; by implication, to excel; (intransitively) to remain or be left; causatively, to leave, cause to abound, preserve
until the third
shliyshiy (shel-ee-shee')
third; feminine a third (part); by extension, a third (day, year or time); specifically, a third-story cell) -- third (part, rank, time), three (years old).
day
yowm (yome)
a day (as the warm hours),
it shall be burnt
saraph (saw-raf')
to be (causatively, set) on fire -- (cause to, make a) burn(-ing), up) kindle, utterly.
in the fire
'esh (aysh)
fire -- burning, fiery, fire, flaming, hot.