Śatapatha Brāhmaṇa ("of a hundred paths") 1.6.3.29

1.6.3.29

sa vā ṛcamanūcya juṣāṇena yajati tadanvimā anyataratodantāḥ prajāḥ prajāyante 'sthi hyṛgasthi hi danto 'nyatarato hyetadasthi karoti

Having recited (at the butter-portions) a Rik-verse as the anuvâkyâ, he recites the yâgyâ with the word 'pleased:' in consequence of this, creatures are brought forth here with teeth on one side (in one jaw); for the Rik means bone and the tooth also is bone, so that he thereby produces bone on one side.