Skandapurana 16.87.24

16.87.24

bhūteśarudraṃ saṃpūjya gacchedvai muktimavyayām ..
iti saṃkṣepataḥ proktamādi rudrasya kīrtanam..
kīrtanīyaṃ dvijātīnāṃ kīrtitaṃ puṇyavarddhanam.. 24 ..

having worshipped the Rudra Bhūteśa, one will indeed attain imperishable liberation. / Thus the proclamation of the first Rudra has been declared in brief; / it is to be celebrated by the twice-born, and when celebrated it increases merit. // 24