Śatapatha Brāhmaṇa ("of a hundred paths") 13.2.2.9

13.2.2.9

vāyavyaṃ śvetam puce utsedhameva taṃ kurute tasmādutsedham praj:! bhaye'bhisaṃśrayantīndrāya svapasyāya vehatam yajñasya sendratāyai vaiṣṇavo vāmano yajño vai viṣṇuryajña evāntataḥ pratitiṣṭhati

A white one, for Vâyu, to the tail,--an elevation he makes this one, whence people in danger betake themselves to an elevated place;--a cow wont to cast her calf, for Indra, the ever active, in order to associate the sacrifice with Indra;--a dwarfish one for Vishnu; for Vishnu is the sacrifice: it is in the sacrifice he (the Sacrificer) thus finally establishes himself.