Shatapatha Brahmana 14.2.2.42

14.2.2.42

atha yajamānāya gharmociṣṭam prayacati sa upahavamiṣṭvā bhakṣayati madhu hutamindratame agnāviti madhu hutamindriyavattame'gnāvityevaitadāhāśyāma te deva gharma namaste astu mā mā hiṃsīrityāśiṣamevaitadāśāste

He then hands to the Sacrificer the remainder of the Gharma. He, having solicited an invitation (to the meal), drinks it with, 'Offered is the honey unto Agni, the greatest of Indras,'--'Offered is the honey unto Agni, the most powerful,' he thereby means to say; 'let us eat of thee, god Gharma: reverence be unto thee, injure us not!'--a blessing he thereby invokes.