Srimad-Bhagavatam: Canto 8 - Chapter 1 - Verse 35
Sanskrit:
निष्ठां ते नरके मन्ये ह्यप्रदातु: प्रतिश्रुतम् ।प्रतिश्रुतस्य योऽनीश: प्रतिपादयितुं भवान् ॥ ३५ ॥
ITRANS:
niṣṭhāṁ te narake manyehy apradātuḥ pratiśrutampratiśrutasya yo ’nīśaḥpratipādayituṁ bhavān
Translation:
You will certainly be unable to fulfill your promise, and I think that because of this inability your eternal residence will be in hell.