Srimad-Bhagavatam: Canto 6 - Chapter 1 - Verse 14
Sanskrit:
साङ्केत्यं पारिहास्यं वा स्तोभं हेलनमेव वा ।वैकुण्ठनामग्रहणमशेषाघहरं विदु: ॥ १४ ॥
ITRANS:
sāṅketyaṁ pārihāsyaṁ vāstobhaṁ helanam eva vāvaikuṇṭha-nāma-grahaṇamaśeṣāgha-haraṁ viduḥ
Translation:
One who chants the holy name of the Lord is immediately freed from the reactions of unlimited sins, even if he chants indirectly [to indicate something else], jokingly, for musical entertainment, or even neglectfully. This is accepted by all the learned scholars of the scriptures.