17 x 23 = 391

  Jarasandha attacked Mathura with an army of 23 Akshohinis. His allies were 

1. Shishupala (Chedi), 
2. Bhagadatta (son of Narakasura of Pragjyotisha), 
3. Rukmi (Vidarbha), 
4. Vinda-Anuvinda (Avanti), 
5. Paundraka (Pundra), 
6. Dantavakra (Karusha), and others. 

But Krishna and Balarama easily destroyed the whole army, except for Jarasandha and his allies. A humiliated Jarasandha attacked Mathura 17 times but was repeatedly defeated.

18th Time On arrival of Kalayavana shifted to Dwarka

https://harekrishnainfo.blogspot.com/search/label/KamsaJarasandhaKalayavana

Breaks

 

Prabhupada

 

https://www.google.com/search?q=prabhupada+mathura

Devaki

 https://www.google.com/search?q=Devak%C3%AE

https://en.brajdiscovery.org/index.php?title=Devaki

https://www.sacred-texts.com/hin/db/bk04ch23.htm