Musar על כתובות 206:24

Our sages of blessed memory expounded (Ketuvot 103b): "'he honors those who fear G-d' (Tehilim 15:4) - this refers to Yehoshafat King of Judah, who, whenever he saw a Torah scholar, would rise up from his throne, hug him, kiss him, and say to him: 'Rebbi, Rebbi, my teacher, my teacher'".