ṚV, 1, 138, 2.1 pra hi tvā pūṣann ajiraṃ na yāmani stomebhiḥ kṛṇva ṛṇavo yathā mṛdha uṣṭro na pīparo mṛdhaḥ /

ṚV, 8, 5, 37.2 yathā cic caidyaḥ kaśuḥ śatam uṣṭrānāṃ dadat sahasrā daśa gonām //

ṚV, 8, 6, 48.1 ud ānaṭ kakuho divam uṣṭrāñcaturyujo dadat /

ṚV, 8, 46, 22.1 ṣaṣṭiṃ sahasrāśvyasyāyutāsanam uṣṭrānāṃ viṃśatiṃ śatā /