Rishi: Yājñavalkya (traditional White Yajurveda attribution; specific r̥ṣi assignment for this short yoking-formula is not consistently fixed in ancillary lists).
Devata: Karman / Yajña (functional deity of the act), with dual reference (‘vām’) implying a paired implement or paired divine recipients depending on ritual setting.
Chandas: Yajus (prose formula; not a fixed metrical chandas).
Who yokes thee? He yokes thee. For whom doth he yoke thee? For him doth he yoke thee: for the work (karman) for you twain, for the appointed service for you twain.