Skandapurana 5.75.10

5.75.10

tatastu devayajanaṃnāma tasya babhūva ha ..
yadanyatra śataṃ kṛtvā kratūnāṃ phalamāpnuyāt ..
tadatraikena labhate kratunā dakṣiṇāvatā .. 6.75.10 ..

From then on, it indeed became known as Devayajana; / the fruit that one would obtain elsewhere by performing a hundred sacrifices, / that one obtains here by a single sacrifice accompanied by sacrificial gifts.