Rig Veda
य॒दा ते॑ हर्य॒ता हरी॑ वावृ॒धाते॑ दि॒वेदि॑वे । आदित्ते॒ विश्वा॒ भुव॑नानि येमिरे ॥ यदा ते हर्यता हरी वावृधाते दिवेदिवे । आदित्ते विश्वा भुवनानि येमिरे ॥
When your beloved horses had augmented day by day, then all existent beings were subject unto you.
english translation