When the mouth became differentiated, Agni, the presiding deity, entered that place along with the gross sense organ called voice, its portion, by which the universal form could utter words. Agni entered the mouth, its abode (padam), which became differentiated in that fetus along with its portion, the voice, by which the universal form could utter words. In this and the following verses the object differentiated in the accusative case (in this verse mouth) refers to adhiṣṭhāna, the adhibhūta aspect, the gross location in which the subtle sense resides. Agni and others in the nominative case are the presiding deities, the adhidaiva aspect of the universal form. The voice in the instrumental case, in this case voice (vacā), adhyātma aspect, the sense organ. The sense object or action of the organ, also adhibhūta, is in the accusative or genitive case. [Note: Sense objects or tan-mātras exist only for the five knowledge senses, and not for the action senses. ] (In this verse it is speech).