CC Madhya 18.194

tāṅra sevā vinā jīvera nā yāya ‘saṁsāra’
tāṅhāra caraṇe prīti — ‘puruṣārtha-sāra’
Word for word: 
tāṅra — His; sevā — service; vinā — without; jīvera — of the conditioned soul; — not; yāya — finishes; saṁsāra — material bondage; tāṅhāra — His; caraṇe — at the lotus feet; prīti — love; puruṣārtha-sāra — the ultimate goal of life.
Translation: 
“No conditioned soul can get out of material bondage without serving the Supreme Personality of Godhead. Love at His lotus feet is the ultimate goal of life.
Purport: 

According to the Muslim scripture, without evādat, offering prayers at a mosque or elsewhere five times daily (namāz), one cannot be successful in life. Śrī Caitanya Mahāprabhu pointed out that in the revealed scripture of the Muslims, love of Godhead is the ultimate goal. Karma-yoga and jñāna-yoga are certainly described in the Koran, but ultimately the Koran states that the ultimate goal is the offering of prayers to the Supreme Person (evādat).