Taittiriyabrahmana 3.10.9.3

3.10.9.3

vṛścátaś ca //
atyam̐hó ha_ā́ruṇiḥ /
brahmacāríṇe praśnā́n prócya prájighāya /
párehi /
plakṣáṃ dáiyāmpātiṃ pṛccha /
véttha sāvitrā́3n ná vetthā́3 íti /
tám āgátya papraccha /
ācā́ryo mā prā́ ha_eṣīt /
véttha sāvitrā́3n ná vetthā́3 íti /
sá ha_uvāca véda_íti //

cut away his evil.
Atyaṃhas Āruṇi,
having taught the questions to a student, sent him forth:
"Go;
ask Plakṣa Dayyāmpāti:
'Do you know the Sāvitra [citi] or do you not know [it]?'"
Having come to him, he asked:
"The teacher has sent me [saying]:
'Do you know the Sāvitra or do you not know [it]?'"
He said: "I know [it]."