Shatapatha Brahmana 8.7.3.15

8.7.3.15

yadveva parameṣṭhinopadadhāti | prajāpatiṃ visrastaṃ devatā ādāya vyudakrāmaṃstasya parameṣṭhī śira ādāyotkramyātiṣṭhan

And, again, as to why he lays it down by means of Parameshthin. When Pragâpati had become disjointed, the deities took him and went off in different directions. Parameshthin took his head, and kept going away from him.