Bhagavad Gita: Chapter 17, Verse 13

विधिहीनमसृष्टान्नं मन्त्रहीनमदक्षिणम् |
श्रद्धाविरहितं यज्ञं तामसं परिचक्षते || 13||

vidhi-hīnam asṛiṣhṭānnaṁ mantra-hīnam adakṣhiṇam
śhraddhā-virahitaṁ yajñaṁ tāmasaṁ parichakṣhate

Audio

https://www.bharattemples.com/wp-content/uploads/bt/2020/10/13-17.MP3.mp3

भावार्थ:

शास्त्रविधि से हीन, अन्नदान से रहित, बिना मन्त्रों के, बिना दक्षिणा के और बिना श्रद्धा के किए जाने वाले यज्ञ को तामस यज्ञ कहते हैं ॥13॥

Translation

Sacrifice devoid of faith and contrary to the injunctions of the scriptures, in which no food is offered, no mantras chanted, and no donation made, is to be considered in the mode of ignorance.

https://www.bharattemples.com/wp-content/uploads/bt/2020/10/17.13.mp3

English Translation Of Sri Shankaracharya’s Sanskrit Commentary By Swami Gambirananda