Bhagavatapurana 10.13.30

10.13.30

dṛṣṭvātha tat-sneha-vaśo 'smṛtātmā sa go-vrajo 'tyātmapa-durga-mārgaḥ /
dvi-pāt kakud-grīva udāsya-puccho 'gād dhuṅkṛtair āsru-payā javena //

30. When they saw, they forgot themselves and were in a trance through their affection for the calves took to a path hard to be followed by their protectors and looked like bi-footed creatures with their heads and tails erect, showering milk all round and running in breathless haste.