Skandapurana 6.3.69.10

6.3.69.10

vratānte caiva gaurdhuryaiḥ śivamuddiśya dīyate .
prīyatāṃ me mahādevaḥ sapatnīko vṛṣadhvajaḥ .. 69.10 ..

And at the end of the vow, a cow along with draft oxen is given dedicated to Śiva:
"May Mahādeva, whose emblem is the bull, be pleased along with his consort!"