Kommentar zu Jechezkiel 46:4

On the Sabbath day shall be six lambs I do not know why, for the Torah said (Num. 28:9): “two lambs,” and “on the Sabbath Day” means either the Sabbath commemorating the Creation or a festival. I, therefore, say that this Sabbath is not the Sabbath commemorating the Creation, but a festival that requires seven lambs and two rams. Scripture comes and teaches you that [the absence of one] does not render the other one invalid, and if he does not find seven, he should bring six, and if he does not find two rams, he should bring one, as our Rabbis expounded regarding the New Moon.