śraddhātrayavibhāgayoga - Verse śloka 13
śloka 13
vidhihīnamasṛṣṭānnaṃ mantrahīnamadakṣiṇam |
śraddhāvirahitaṃ yajñaṃ tāmasaṃ paricakṣate ||17-13||
Translation
That sacrifice which is performed without scriptural injunctions, without offering of food, without mantras, without dakshina and without faith—is called Tamasic sacrifice.