This is cited as law by R. Abraham Gombiner in Magen Avraham O.C. 167:1
אם שמע דין ונראה לו שהלכה כך מותר לאמרו בשם אדם גדול כי היכי דליקבלי מיניה
If one hears a law and it seems to him that the law is as such it is permissible to say it in the name of a great person in order that they accept it from him.
• Mkadesh yourself by abstaining also from that which is permitted to you" (Yevamot 20a)
Ramban counts it as a mitzvah.
• Nedarim 10a - 2 Shittas, one says a Nasir is a Choteh (sinner). What's his averah ? Not drinking wine? Is what the Torah has forbidden you not enough!
Another one says he's a "Ish Kodesh". Why, cause he ...