चक्रायुधस्य नामानि सदा सर्वत्र कीर्तयेत् ।
नाशौचं कीर्तने तस्य स पवित्रकरो यतः ॥
cakrāyudhasya nāmāni sadā sarvatra kīrtayet |
nāśaucaṁ kīrtane tasya sa pavitra-karo yataḥ ||
(Padma Purāṇa; Skanda Purāṇa; Viṣṇu-dharmottama; cited in Hari-bhakti-vilāsa: 11.409)
“One should always and everywhere chant the names of the Wielder of the cakra since he is purifying and there is no [consideration of] impurity in chanting about him.”