Śatapatha Brāhmaṇa ("of a hundred paths") 4.6.4.1

4.6.4.1

athāto mahāvratīyasyaiva | prajāpaterha vai prajāḥ sasṛjānasya parvāṇi visasraṃsuḥ sa visrastaiḥ parvabhirna śaśāka saṃhātuṃ tato devā arcantaḥ śrāmyantaścerusta etam mahāvratīyaṃ dadṛśustamasmā agṛhṇastenāsya parvāṇi samadadhuḥ

Then as to the Mahâvratîya (graha). Now when Pragâpati had created the living beings, his joints were relaxed: with his relaxed joints he was unable to raise himself. Then the gods went on praising and toiling. They saw this Mahâvratîya (cup) and drew it for him: thereby they restored his joints.