Matsya Purana 249.8

249.8

yā nāsti sarvalokānāṃ devānāṃ sarvarakṣasām.
na nāgānāmṛṣīṇāñca na ca brahmendra viṣṇuṣu .. 249.8 ..

In days gone by, when war ensued between the Devas and the Asuras hundreds of Devas used to be killed, but amongst the Daityas, when they were killed, they were restored to their lives by Śukrâchârya, the son of Bhṛigu with the help of Sañjîvanî mantra Lord Śiva was pleased with Bhârgava and gave him this wonderful Mṛita Sañjîvanî mantra Knowing that Śukrâchârya was acquainted with the above Mâhesvarî Vidyâ direct from the mouth of Lord Śiva, the Daityas began to fight with the Devas when Śukra restored to life the Daityas that were killed. Śukra obtained from Śaṅkara that knowledge, which all the worlds, the Devas, Râkṣasas, Nâgas, Ṛiṣis Brahmâ, Chandra and Viṣṇu could not get, so Śukra became very pleased Thus, when the great war ensued again between the Devas and the Dānavas, the Dānavas" army, when killed, were early called to their lives Then Indra and Vṛihaspati, and the other Devas became powerless and greatly depressed It dismayed the Devas, seeing which, Brahmâ addressed them thus on the summit of the Mount Meru.—4-12