Manava Dharmashastra 2.70

2.70

adhyeṣyamāṇas tv ācānto yathāśāstram udaṅmukhaḥ
brahmāñjalikṛto 'dhyāpyo laghuvāsā jitendriyaḥ //

But (a student) who is about to begin the Study (of the Veda), shall receive instruction, after he has sipped water in accordance with the Institutes (of the sacred law), has made the Brahmangali, (has put on) a clean dress, and has brought his organs under due control.