Caitanya-caritāmṛta 6.310
sāḍe sāta prahara yāya kīrtana-smaraṇe āhāra-nidrā cāri daṇḍa seha nahe kona dine
[saade saata prahara yaaya keertana-smarane aahaara-nidraa chaari danda seha nahe kona dine]
Blended reading (Sanskrit + English inline)
sāḍe sāta prahara yāya kīrtana-smaraṇe āhāra-nidrā cāri daṇḍa seha nahe kona dine
Raghunātha dāsa spent more than twenty-two hours out of every twenty-four chanting the Hare Kṛṣṇa mahā-mantra and remembering the lotus feet of the Lord. He ate and slept for less than an hour and a half, and on some days that also was impossible.
My note
Source: vedabase.io