Caitanya-caritāmṛta 10.102
sārdha sapta-prahara kare bhaktira sādhane cāri daṇḍa nidrā, seha nahe kona-dine
[saardha sapta-prahara kare bhaktira saadhane chaari danda nidraa, seha nahe kona-dine]
Blended reading (Sanskrit + English inline)
sārdha sapta-prahara kare bhaktira sādhane cāri daṇḍa nidrā, seha nahe kona-dine
He engaged himself in devotional service for more than twenty-two and a half hours a day, and for less than two hours he slept, although on some days that also was not possible.
My note
Source: vedabase.io