The order carriers of Lord Viṣṇu, who are worshiped even by the demigods, possess wonderful bodily features exactly like those of Viṣṇu and are very rarely seen. The Viṣṇudūtas protect the devotees of the Lord from the hands of enemies, from envious persons and even from my jurisdiction, as well as from natural disturbances.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
भूतानि विष्णोः सुरपूजितानि दुर्दर्शलिङ्गानि महाद्भुतानि । रक्षन्ति तद्भक्तिमतः परेभ्यो मत्तश्च मर्त्यानथ सर्वतश्च
bhūtāni viṣṇoḥ surapūjitāni durdarśaliṅgāni mahādbhutāni | rakṣanti tadbhaktimataḥ parebhyo mattaśca martyānatha sarvataśca
SB 6.3.18