CC Madhya 4.34

vasi’ nāma laya purī, nidrā nāhi haya
śeṣa-rātre tandrā haila, — bāhya-vṛtti-laya
Word for word: 
vasi’ — sitting there; nāma laya — chants the Hare Kṛṣṇa mahā-mantra; purī — Mādhavendra Purī; nidrā — sleep; nāhi haya — there was not; śeṣa-rātre — at the end of the night; tandrā — dozing; haila — there was; bāhya-vṛtti — of external activities; laya — stop.
Translation: 
Mādhavendra Purī could not sleep. He sat and chanted the Hare Kṛṣṇa mahā-mantra, and at the end of the night he dozed a little, and his external activities stopped.