Shatapatha Brahmana 9.4.1.9

9.4.1.9

suṣumṇa iti | suyajñiya ityetatsūryaraśmiriti sūryasyeva hi candramaso raśmayaścandramā gandharvastasya nakṣatrāṇyapsarasa iti candramā ha gandharvo nakṣatrairapsarobhirmithunena sahoccakrāma bhekurayo nāmeti bhākurayo ha nāmaite bhāṃ hi nakṣatrāṇi kurvanti sa na idam brahma kṣatram pātviti tasyokto bandhuḥ

'The most blessed,'--that is, the most worthy of worship,--'sun-rayed,'--for like the sun's are the moon's rays;--'Kandramas (the moon) is the Gandharva: his Apsaras are the stars;'--for as a Gandharva the moon, indeed, went forth with the stars as the Apsaras, his mates;--'Luminous (bhekuri) by name;'--light-giving (bhâkuri) these, indeed, are called, for the stars give light;--'may he protect this our priesthood and nobility!' the meaning of this has been explained.