From Shani Mahatmya - The Mythology Behind Brihaspati or Jupiter - Jothishi

https://jothishi.com/shani-mahatmya-mythology-brihaspati-jupiter/ Guru is not only a good and benefic planet but he is also the Guru of Indra, the Devatas and all the celestials. Shani Mahatmya is a narration of the happenings in the life of the King Vikramaditya during his seven and a half year Saturn period called Sade-Sati.

https://jothishi.com/shani-mahatmya-mythology-brihaspati-jupiter/