Śrīmad-Bhāgavatam · Text 11.21.16
Who is speaking and story frame
क्वचिद् गुणोऽपि दोष: स्याद् दोषोऽपि विधिना गुण: ।
गुणदोषार्थनियमस्तद्भिदामेव बाधते ॥ १६ ॥
kvacid guṇo ’pi doṣaḥ syād
doṣo ’pi vidhinā guṇaḥ
guṇa-doṣārtha-niyamas
tad-bhidām eva bādhate
Sometimes piety becomes sin, and sometimes what is ordinarily sin becomes piety on the strength of Vedic injunctions. Such special rules in effect eradicate the clear distinction between piety and sin.
Read the purport on Vedabase.ioFrom Canto 10, chapter 14 onward, the translation and purports were completed by Śrīla Prabhupāda's disciples after his departure, and published by the Bhaktivedanta Book Trust.