Skandapurana 16.47

Īśvara said: / Then one should go, O great goddess, to the god served by Guru, / to the eastern region of Umā, in the southeast area of Siddheśa.

There stands the great liṅga installed by the preceptor of the gods. / Having worshipped the liṅga with supreme devotion for a thousand years,

he satisfied the lord of gods, Bhava, Śarva, the lord of Umā. / He obtained all desires unobtainable by the undisciplined.

And having obtained the status of being worshipped by the gods, divine knowledge, / and likewise planetary status, he now rejoices in heaven.

Having seen it with devotion, a human being does not meet an evil state. / Those best among men who see the liṅga made by Bṛhaspati,

affliction caused by Bṛhaspati never arises for them. / There, on the bright fourteenth [lunar day], and on Thursday, O beloved,

having worshipped the liṅga according to rule with all royal services, / or with a disposition of devotion, one attains the supreme state.

A mortal who performs with devotion a ritual ablution / with a thousand palas of the liquid of fivefold ambrosia, is indeed freed from the three debts:

from the maternal, from the paternal, O goddess, and from that originating from the guru. / Purified in soul from all sins, free from the pairs of opposites, he attains liberation.

Thus has been declared in brief the māhātmya dedicated to the deity Guru. / For him who listens with devotion, Guru will be pleased.

Thus in the glorious Skanda Purāṇa, in the collection of eighty-one thousand [verses], in the seventh Prabhāsakhaṇḍa, in the first Prabhāsakṣetramāhātmya, the forty-seventh chapter named 'Description of the Bṛhaspatīśvara-māhātmya'.