Verse 4.4.2.7

atha pracaraṇīti srugbhavati | tasyāṃ caturgṛhītamājyaṃ gṛhītvādhvaryuḥ śālākairdhiṣṇyānvyāghārayati tadyacālākairdhiṣṇyānvyāghārayati yadevainānado devā abruvaṃstṛtīyasavane vo ghṛtyāhutiḥ prāpsyati na saumyāpahṛto hi yuṣmatsomapīthastena somāhutiṃ saināneṣā tṛtīyasavana eva ghṛtyāhutiḥ prāpnoti na saumyā yacālākairdhiṣṇyānvyāghārayati tānetaireva yajurbhiryathopakīrṇaṃ yathāpūrvaṃ vyāghārayati mārjālīya evottamam

Preview of English translation:

7. Now there is an offering-spoon called 'pracarani.' Therein the Adhvaryu takes ghee by four ladlings (with the dipping-spoon) and pours it on the Dhishnya hearths by means of fagots (held over them). The reason why he pours ghee on the hearths by means of fagots is this. Because, on a former occasion, the gods said to those (Gandharva Soma-wardens), “At the third pressing an offering of ghee shall fall to your share, but not one of Soma, for the Soma-draught has been taken from you, wherefore ye are not worthy of a Soma-offering,” that same offering of ghee now falls to their share at the evening pressing, but not one of Soma, in that he pours ghee on the hearths by means of fagots. One after another, in the order in which they were thrown up, and with the same formulas, he pours ghee upon them; on the Marjaliya last of all.

For a detailled translation, including proper diacritics and footnotes, go the full English translation.