Atharva Veda 6.98

indro jayāti na parā jayātā adhirājo rājasu rājayātai carkṛtya īḍyo vandyaś copasadyo namasyo bhaveha

To Indra: for victory

May Indra conquer, may he not be conquered; may he king it as over-king among kings; be thou here one to be famed, to be praised, to be greeted, to be waited on, and to be reverenced.

tvam indrādhirājaḥ śravasyus tvaṃ bhūr abhibhūtir janānām tvaṃ daivīr viśa imā vi rājāyuṣmat kṣatram ajaraṃ te astu

Thou, O Indra, art over-king, ambitious (çravasyú), thou art the overcomer of people; do thou rule over these folk (viçás) of the gods; long-lived, unfading (ajára) dominion be thine.

prācyā diśas tvam indrāsi rājotodīcyā diśo vṛtrahaṃ chatruho 'si yatra yanti srotyās taj jitaṃ te dakṣiṇato vṛṣabha eṣi havyaḥ

Of the eastern quarter thou, O Indra, art king; also of the northern quarter art thou, O Vritra-slayer, slayer of foes; where the streams go, that is thy conquest; in the south, as bull, thou goest worthy of invocation.