Vedavyasasmriti 26

26

śaucācāravicārārthaṃ dharmmaśāstramapi dvijaḥ .
paṭheta gurūtaḥ samyak karmma taddiṣṭamācaret .. 1.25 ..

For the purpose of investigating purification and conduct, a twice-born should also study / the Dharmaśāstra properly from the teacher, and practice the rite directed by it. // 1.25