Rashi on Numbers 28:7/רש"י על במדבר כ״ח:ז׳

1ונסכו (more lit., its pouring forth — i.e. its offering that was poured forth) — wine (cf. Numbers 15:5).

2בקדש הסך CAUSING IT TO BE POURED FORTH ON THE HOLY SPOT — upon the altar they shall be poured out.

3נסך שכר A POURING FORTH OF STRONG DRINK — wine that has intoxicating power. This excludes wine straight out of its vine press (new wine which is non-intoxicating) (Bava Batra 97a).