Madhvaon Brahma Sūtra 4.2.1

Uma presiding over speech is withdrawn into Rudra presiding over Mind ; for it is a matter of observation that speech is under the control of Mind; and the Sruti (Word) runs thus; "He understands those round him until his Speech is not withdrawn into Mind (Ch. VI. 15. 1). It is said in the Skânda: “ By the wise, Uma indeed is called Speech and Rudra is called Mind; and he who knows this couple is not deprived of the blessing of wedlock.”