Revākhaṇḍa ascribed to the Vāyupurāṇa (RKV) 168.21

168.21

tapaścacāra sumahaddivyaṃ varṣaśataṃ kila /
tatastuṣṭo mahādevaḥ sākṣāt parapuraṃjayaḥ //

performed very great austerity for indeed a hundred celestial years.
Then Mahādeva, the conqueror of enemy cities, was pleased in person;