Śatapatha Brāhmaṇa ("of a hundred paths") 8.4.3.10

8.4.3.10

pañcadaśabhirastuvateti | daśa hastyā aṅgulayaścatvāri dorbāhavāṇi yadūrdhvaṃ nābhestatpañcadaśaṃ tenaiva tadastuvata kṣatramasṛjyateti kṣatramasṛjyateti kṣatramatrāsṛjyatendro 'dhipatirāsīditīndro 'trādhipatirāsīt

'With fifteen they sang praises,'--there are ten fingers, four fore-arms and upper arms, and what is above the navel is the fifteenth: it is therewith they then sang praises the Kshatra was created,'--the nobility indeed was now created;--'Indra was the lord!'--Indra indeed was now the lord.