Numbers 29:34

New King James Version

also one goat as a sin offering, besides the regular burnt offering, its grain offering, and its drink offering.

See the chapter Copy

and their grain offering and their drink offerings for the bulls, for the rams, and for the lambs, by their number, according to the ordinance;

‘On the eighth day you shall have a sacred assembly. You shall do no customary work.

this is the burnt offering for every Sabbath, besides the regular burnt offering with its drink offering.