Śrī Caitanya-caritāmṛta - Ādi-līlā 13.123

"Anyone who attains a human body but does not take to the cult of Śrī Caitanya Mahāprabhu is baffled in his opportunity. Amṛtadhunī is a flowing river of the nectar of devotional service. If after getting a human body one drinks the water in a poison pit of material happiness instead of the water of such a river, it would be better for him not to have lived, but to have died long ago."

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Śrī caitanya-caritāmṛta Ādi 13.123