why did you fold your tongue? —

(and went to the shore of) the pond having deep waters —

in a pond —

 placed (in his mouth) (at that time) —

offered through the fire —

 placed the nail and tore —

ās the vaidhikas offered all dharmas —

being filled —

offered (at the lotus feet of the ṣrīvaishṇavas) —

with great devotion —

keeping my mouth (which is the desire that is the tool to enjoy) ready —

 made to enter —

 drinking  —