Skandapurana 7.4.52.6

7.4.52.6

tathaiva jaladatvepi72 vaheyaṃ tvāha73 mavyayam(?) . . 8.31.50 . .
sanatkumāra uvāca
evamastviti saṃ74 procya vāhanatve vyakalpayat75 .
jīmūtaṃ76 vyāsa bhagavān yajñamūrtimatiprabham . . 51 . .
yadā tu yajato vyāsa dakṣasya sumahātmanaḥ .
śiraśchinnaṃ śareṇāśu yajñasyāmitatejasaḥ .
tadā śiraskaṃ77 taṃ yajñaṃ vāhanatvādapānudata78 . .52 .

"In the same manner, even in the state of being a cloud, I shall bear you, the imperishable one." / Sanatkumāra said: / Saying "So be it," the Lord appointed as his mount, / O Vyāsa, the cloud, which was the sacrifice incarnate and exceedingly brilliant. / But when, O Vyāsa, of the noble-souled Dakṣa performing sacrifice, / the head of that sacrifice of immeasurable splendour was severed swiftly with an arrow, / then, because it had become headless, he dismissed that sacrifice from being his mount.