RV 4.39.5
इन्द्रम् इवेद् उभये वि ह्वयन्त उदीराणा यज्ञम् उपप्रयन्तः । दधिक्राम् उ सूदनम् मर्त्याय ददथुर् मित्रावरुणा नो अश्वम् ॥
indram ived ubhaye vi hvayanta udīrāṇā yajñam upaprayantaḥ | dadhikrām u sūdanam martyāya dadathur mitrāvaruṇā no aśvam ||
Devanagari rendered by HREEM from the edition's roman (IAST) text; the IAST is the edition's own.
Both sides invoke him as they call on Indra when they stir forth and turn to sacrificing. To us have Varuna and Mitra granted the Courser Dadhikris, a guide for mortals.
Translated by Ralph T. H. Griffith (1896)