Gobhilagrihyasutra 3.8.2

3.8.2

tasya juhuyād ā no mitrāvaruṇe 'ti prathamāṃ, mā nas toka iti dvitīyām,

Of that (milk-rice) let him sacrifice, the first oblation with (the verse), 'To us, O Mitra and Varuna' (Sâma-veda I, 220), the second with (the verse), 'Not in our offspring' (Rig-veda I, 114, 8),