Rigveda 8.063.04

He, attempting as poets increase, Indra, the listener of speech; auspicious is the sun’s offering here—go and sit with us.

As in former times, so now too is Indra the blesser of the worshipper and the bearer of him who praiseshim; may he come among us auspicious for our protection at the oblation of the Soma.

To noblest Agni, Friend of man, best Vrtra-slayer, are we come, Him in whose presence Rksa's son, mighty Srutarvan, waxes great;