Let me make it clear that there is…….
kali biloki jaga hita hara girija, sabara mantra jala jinha sirija.
anamila akhara aratha na japµu, pragata prabhau mahesa pratapµu….goswamiji
Seeing the prevalence of the Kali age Hara and Girija (siva and Parvati) evolved a string
of spells in the tongue of savages, incoherent syllables which yield no interpretation and
require no repetition, but whose efficacy is patent, revealing siva.s glory.

Now there is a Mantra series called Sabar Mantra series , which our rishis knew , but there is a 0.00001% chance that some of our rishiputras may know . So knowing tantra, if it is a part of sabar mantra series, is only reliable then .