Śatapatha Brāhmaṇa ("of a hundred paths") 3.6.2.4

3.6.2.4

sā ha suparṇyuvāca | asya salilasya pāre 'śvaḥ śveta sthāṇau sevate tamaham paśyāmīti tameva tvam paśyasīti taṃ hītyatha ha kadrūruvāca tasya vālo nyaṣañji tamamuṃ vāto dhūnoti tamaham paśyāmīti

Suparnî said, 'On yonder shore of this ocean there stands a white horse at a post, that I see; doest thou also see it?'--'I verily do!' Then said Kadrû 'Its tail was just now hanging down; there, now the wind tosses it, that I see.'