Skandapurana 5.262.16

5.262.16

tridaṃḍī sa tu vijñeyo jñāte deve niraṃjane ..
manodaṇḍaḥ karmadaṇḍo vāgdaṃḍo yasya yoginaḥ .. 16 ..

He is to be known as a bearer of three staves (tridaṇḍin) when the spotless God is known; / the yogin whose staff is the mind, whose staff is action, and whose staff is speech— (16)