Agniveshyagrihyasutra 2.7.9.18

2.7.9.18

samānamata ūrdhvam agneḥ samidasi iti paścārdhaṃ yamasya samidasi iti dakṣiṇārdham somasya samidasi ityuttarārdham \

From here on it is the same. [With the words:] 'Agni's kindling stick art thou,' [he lays] the western half; [with:] 'Yama's kindling stick art thou,' the southern half; [with:] 'Soma's kindling stick art thou,' the northern half.