vidhi-hīnam — without scriptural direction; asṛṣṭa-annam — without distribution of prasādam; mantra-hīnam — with no chanting of the Vedic hymns; adakṣiṇam — with no remunerations to the priests; śraddhā — faith; virahitam — without; yajñam — sacrifice; tāmasam — in the mode of ignorance; paricakṣate — is to be considered.
Any sacrifice performed without regard for the directions of scripture, without distribution of prasādam [spiritual food], without chanting of Vedic hymns and remunerations to the priests, and without faith is considered to be in the mode of ignorance.
. . .
विधिहीनमसृष्टान्नं मन्त्रहीनमदक्षिणम् ।
श्रद्धाविरहितं यज्ञं तामसं परिचक्षते ॥ १३ ॥