Note 9 — Chapter XVII · SAṄKÂŚYA. BUDDHA’S ASCENT TO AND DESCENT FROM THE TRAYASTRIṂŚAS HEAVEN, AND OTHER LEGENDS.
James Legge translation
This was Brahmâ, the first person of the Brahmânical Trimurti, adopted by Buddhism, but placed in an inferior position, and surpassed by every Buddhist saint who attains to bodhi.