Mishnayos Menachos Perek 9 Mishnah 6

חוץ מן הבכור והמעשר והפסח והחטאת והאשם – because it is written in the [Torah] portion of the libations (Numbers 15:3): “[and would present an offering by fire to the LORD from the herd or from the flock, be it a burnt-offering or sacrifice,] in fulfillment of a vow explicitly uttered, or as a freewill offering,” when it comes in the form of a vow or a freewill offering it requires libations, excluding the firstling and the tithe and the Passover offering and the sin-offering and guilt-offering that come as an obligation, not for a freewill offering, for they don’t require libations. One is even able [to bring] obligatory offerings that come on account of the Festival - on the Festival, as for example, the burnt offerings of appearance in the Temple/pilgrimage and the peace-offerings of the Festival do they would not require libations, the inference teaches us “or at your fixed occasions” (Numbers 15:3), anyone who comes on your fixed occasions is required to bring libations. But the goats of sin-offerings that come as a requirement for the Festival do not require libations, as it is written in the [Torah] portion of libations (Numbers 15:8): “And if it is an animal from the herd that you offer to the LORD as a burnt offering or as a sacrifice,” an animal from the herd was included, within the rule of (Numbers 15:3): “and would present an offering by fire to the LORD from the herd or from the flock,” that implies that all offerings by fire require libations except for [fire-offerings] that he (i.e., God) excluded, and why was it excluded? To make an analogy to it, that just as an animal from the herd is unique that comes as a vow or as a freewill offering, so also everything that comes as a vow or as a freewill offering, excluding the goats of the Festivals that come as sin-offerings, for the sin-offering does not come as a vow or as a freewill offering, for they don’t require libations (see Tractate Menahot 90b).

חטאתו ואשמו של מצורע טעונים נסכים – because they do not come for a sin-offering like other sin-offerings and guilt-offerings. For the sin-offering of a Nazirite does not require libations because the Nazirite [himself] is a sinner, as it is written (Numbers 6:11): “and make expiation for the guilt on his behalf for the guilt he incurred/מאשר חטא על –הנפש” – because he denied/restrained himself from the enjoyment of wine.