[Advaita-l] मन्त्रशास्त्रम् ?

[Venkata sriram P]

Namaste,
 
In srImadbhAgavata, the episode of Indra slaying pAkAsura has been
mentioned.  This comes in 11th Chapter of 8th skandha.  
 
At the time of churning of kSIra sAgara, Indra slays 4 demons namely
Jambhasura, Namuchi, Bala & Paka.  Here is the reference in 19th sloka:
 
////
 
jambham srutva hatam tasya jnatayo naradad rseh
namucis ca balah pakas tatrapetus tvaranvitah......19th sloka
 
//
 
As regards the reference to mantrashAstra, it has been quoted very 
vaguely and i am unable to trace out.  
 
regs,
sriram