Atharvaveda 13.2.30

13.2.30

rócase diví rócase antárikṣe pátaṅga pr̥thivyā́ṃ rocase rócase apsv àntáḥ |
ubhā́ samudráu rúcyā vy ā̀pitha devó devāsi mahiṣáḥ svarjít ||30||

Thou shinest (ruc) in the sky, thou shinest in the atmosphere, O flying one; on the earth thou shinest, thou shinest within the waters; both oceans thou hast penetrated (vi-āp) with thy sheen (rúci); a god, O god, art thou, a heaven-conquering bull (mahiṣá).