AVŚ 19.4.1
याम् आहुतिं प्रथमाम् अथर्वा या जाता या हव्यम् अकृणोज् जातवेदाः । तां त एतां प्रथमो जोहवीमि ताभिष् टुप्तो वहतु हव्यम् अग्निर् अग्नये स्वाह ॥१॥
yām āhutiṃ prathamām atharvā yā jātā yā havyam akṛṇoj jātavedāḥ | tāṃ ta etāṃ prathamo johavīmi tābhiṣ ṭupto vahatu havyam agnir agnaye svāha ||1||
Devanagari rendered by HREEM from the edition's roman (IAST) text; the IAST is the edition's own.
What oblation (ā́huti) Atharvan sacrificed first, with what one Jātavedas made an offering, that same do I first call loudly for thee; gratified with that, let Agni carry the offering: hail to Agni.
Translated by William Dwight Whitney (1905)