Srimad-Bhagavatam: Canto 11 - Chapter 1 - Verse 42

Sanskrit:

भिक्षोर्धर्म: शमोऽहिंसा तप ईक्षा वनौकस: ।गृहिणो भूतरक्षेज्या द्विजस्याचार्यसेवनम् ॥ ४२ ॥

ITRANS:

bhikṣor dharmaḥ śamo ’hiṁsātapa īkṣā vanaukasaḥgṛhiṇo bhūta-rakṣejyādvijasyācārya-sevanam

Translation:

The main religious duties of a sannyāsī are equanimity and nonviolence, whereas for the vānaprastha austerity and philosophical understanding of the difference between the body and soul are prominent. The main duties of a householder are to give shelter to all living entities and perform sacrifices, and the brahmacārī is mainly engaged in serving the spiritual master.

Purport:

The brahmacārī lives in the āśrama of the spiritual master and personally assists the ācārya. Householders generally are entrusted with the performance of sacrifice and Deity worship and should provide maintenance for all living entities. The vānaprastha must clearly understand the difference between body and soul in order to maintain his status of renunciation, and he should also perform austerities. The sannyāsī should fully absorb his body, mind and words in self-realization. Having thus achieved equanimity of mind, he is the best well-wisher of all living entities.