Bhagavatapurana 1.18.39

1.18.39

sa vā āṅgiraso brahman śrutvā sutavilāpanam /
unmīlya śanakairnetre dṛṣṭvā cāṃse mṛtoragam //

39-40. O Brahman, that sage of Angiras's family heard the wailing of his son, slowly opened his eyes, saw the dead serpent

on his own shoulder, and, removing it, inquired: "Child, why do you weep? Who has wronged you?" Thus asked, he (the boy) told him (the fact).