raajan

Oh; king

muktaH

having been released

piitaamahaniyogaacca

by the orders of Lord Brahma (your grand-father)

shambaravR^itrahaa

Devendra who killed demons called Shambara and Vritra

sarvadevanamaskR^itaH

and who was adored by all celestials

gataH

went (back)

tritviSTapam

to heaven.