Srimad-Bhagavatam: Canto 10 - Chapter 1 - Verse 24

Sanskrit:

दानव्रततपोहोम जपस्वाध्यायसंयमै: ।श्रेयोभिर्विविधैश्चान्यै: कृष्णे भक्तिर्हि साध्यते ॥ २४ ॥

ITRANS:

dāna-vrata-tapo-homajapa-svādhyāya-saṁyamaiḥśreyobhir vividhaiś cānyaiḥkṛṣṇe bhaktir hi sādhyate

Translation:

Devotional service unto Lord Kṛṣṇa is attained by charity, strict vows, austerities and fire sacrifices, by japa, study of Vedic texts, observance of regulative principles and, indeed, by the performance of many other auspicious practices.

Purport:

Śrīla Viśvanātha Cakravartī explains the processes described here as follows. Dāna: donations given to Lord Viṣṇu and His devotees. Vrata: observing vows such as Ekādaśī. Tapas: renunciation of sense gratification for Kṛṣṇa’s sake. Homa: fire sacrifices dedicated to Viṣṇu. Japa: privately chanting the holy names of the Lord. Svādhyāya: study and recitation of Vedic texts such as the Gopāla-tāpanī Upaniṣad.