Taittiriyabrahmana 3.10.11.3

3.10.11.3

tásya ha_evā́horātrā́ṇi /
amúṣmin_loké śevadhíṃ ná dhayanti /
ádhītam̐ ha_evá sá śevadhím ánu páraiti //
bharádvājo ha tribhír ā́yurbhir brahmacáryam uvāsa /
tám̐ ha jī́rṇim̐ stháviram̐ śáyānam /
índra upavrájya_uvāca /
bháradvāja /
yát te caturthám ā́yur dadyā́m /
kím enena kuryā íti /
brahmacáryam evá_enena careyam íti ha_uvāca /

for him, the day-and-nights
do not suck out his treasure in yonder world;
he goes after a treasure that has not been sucked dry.
Bharadvāja lived in Vedic studentship for three lifespans.
To him, lying there, worn out and old,
Indra came up and said:
"Bharadvāja,
if I were to give you a fourth lifespan,
what would you do with it?"
"I would practice Vedic studentship with it," he said.