Allowing a young Torah Scholar to act as a court on his own: Moed Katan 17a
Allowing an involved party to remind him of Testimony: Ketuvot 20b
Statements against Torah Scholars aiding an evil Court: Shabbat 139a
In interpretation and rescension of his vows: Nedarim 14a, 20a
Allowing a torah scholar to sit while testifying: Zevachim 16a, 16b
