RV 5.11.2
यज्ञस्य केतुम् प्रथमम् पुरोहितम् अग्निं नरस् त्रिषधस्थे सम् ईधिरे । इन्द्रेण देवैः सरथं स बर्हिषि सीदन् नि होता यजथाय सुक्रतुः ॥
yajñasya ketum prathamam purohitam agniṃ naras triṣadhasthe sam īdhire | indreṇa devaiḥ sarathaṃ sa barhiṣi sīdan ni hotā yajathāya sukratuḥ ||
Devanagari rendered by HREEM from the edition's roman (IAST) text; the IAST is the edition's own.
Ensign of sacrifice, the earliest Household-Priest, the. men have kindled Agni in his threefold seat, With Indra and the Gods together on the grass let the wise Priest sit to complete the sacrifice.
Translated by Ralph T. H. Griffith (1896)