Vaishnava Dharmashastra 1.6

1.6

udgātrāntro homaliṅgo bījauṣadhimahāphalaḥ
vedyantarātmā mantrasphigvikṛtaḥ somaśoṇitaḥ //

His entrails were the (three) chanters of the Sama-veda; his member was the burnt-oblation; his scrotum was the sacrificial seeds and grains; his mind was the altar (in the hut for the wives and domestic uses of the sacrificer); the hindparts (of Vishnu) in his transformation were the Mantras; his blood was the Soma juice.