Leviticus 23:36

Seven days ye shall offer an offering made, by fire unto the
Lord
A burnt offering; what this was, and how many were offered on each day, see at large in ( Numbers 29:13-34 ) ;

on the eighth day shall be an holy convocation unto you;
as on the first day; (See Gill on Leviticus 23:35):

and ye shall offer an offering made by fire unto the Lord;
which was different from that on all the other days, being one bullock only ( Numbers 29:35 Numbers 29:36 ) ;

it [is] a solemn assembly;
of all the people, when they were gathered together before the Lord. Some render the word used a "restraint" or "detention", and interpret it of restraining or detaining them from servile work, as in the next clause; so Aben Ezra and Gersom; but this sense seems to make that clause unnecessary and is never used elsewhere where that is:

ye shall do no servile work [therein];
as on the first day; (See Gill on Leviticus 23:35).