C. F. Keil and Franz Delitzsch on Numbers 28:9-10

Num 28:9-10

The Sabbath-offering, which was to be added to the daily sacrifice (על, upon it), consisted of two yearling lambs as a burnt-offering, with the corresponding meat-offering and drink-offering, according to the general rule laid down in Num 15:3., and is appointed here for the first time; whereas the sabbatical feast had already been instituted at Exo 20:8-11 and Lev 23:3. “The burnt-offering of the Sabbath on its Sabbath,” i.e., as often as the Sabbath occurred, every Sabbath.