Srimad-Bhagavatam: Canto 6 - Chapter 1 - Verse 18
Sanskrit:
धन्वन्तरिर्भगवान् पात्वपथ्याद्द्वन्द्वाद् भयादृषभो निर्जितात्मा ।यज्ञश्च लोकादवताज्जनान्ताद्बलो गणात् क्रोधवशादहीन्द्र: ॥ १८ ॥
ITRANS:
dhanvantarir bhagavān pātv apathyāddvandvād bhayād ṛṣabho nirjitātmāyajñaś ca lokād avatāj janāntādbalo gaṇāt krodha-vaśād ahīndraḥ
Translation:
May the Supreme Personality of Godhead in His incarnation as Dhanvantari relieve me from undesirable eatables and protect me from physical illness. May Lord Ṛṣabhadeva, who conquered His inner and outer senses, protect me from fear produced by the duality of heat and cold. May Yajña protect me from defamation and harm from the populace, and may Lord Balarāma as Śeṣa protect me from envious serpents.
Purport:
To live within this material world, one must face many dangers, as described herein. For example, undesirable food poses a danger to health, and therefore one must give up such food. The Dhanvantari incarnation can protect us in this regard. Since Lord Viṣṇu is the Supersoul of all living entities, if He likes He can save us from adhibhautika disturbances, disturbances from other living entities. Lord Balarāma is the Śeṣa incarnation, and therefore He can save us from angry serpents or envious persons, who are always ready to attack.