Trained

Trained in arms by the 

1. preceptor Drona, 
2. by Sakra, and 
3. Vaisravana, and 
4. Yama, and 
5. Varuna, and 
6. Agni, and 
7. Kripa, and 
8. Krishna of Madhu's race, and 
9. by the wielder of the Pinaka (Siva)

https://www.sacred-texts.com/hin/m04/m04045.htm