Mudgalapurana 2.8.76

2.8.76

tatastatkṛpayā tena svātmā tatra samarpitaḥ |
yogābhedamayatvena jāta ātmanivedakaḥ ||

Then, by his grace, his own self was offered there by him; / by virtue of consisting of the non-difference of yoga, he became one who offers himself (ātmanivedaka).