CC Madhya 3.136

ei-mata daśa-dina bhojana-kīrtana
eka-rūpe kari’ kare prabhura sevana
Word for word: 
ei-mata — in this way; daśa-dina — continuously for ten days; bhojana-kīrtana — eating and chanting; eka-rūpe — without change; kari’ — doing; kare — does; prabhura — of the Lord; sevana — service.
Translation: 
For ten continuous days Advaita Ācārya held feasting and chanting in the evening. He served the Lord in this way without any change.