Śatapatha Brāhmaṇa ("of a hundred paths") 8.7.2.15

8.7.2.15

sa vā ātmana evādhi pakṣapucāni cinoti | ātmano hyevādhyaṅgāni prarohantyatha yatpurastādarvācīrupadadhyādyathānyata āhṛtyāṅgam pratidadhyāttādṛktat

The wings and tail he builds on to the body, for the wings and tail grow on to the body; but were he first to lay down those (bricks) turned away (from the body), it would be as if he were to take a limb from elsewhere and put it on again.