Cāturhotra as Inner Sacrifice (Yoga-Yajña) and Nārāyaṇa Recitation
गन्धो रसश्षु रूपं च शब्द: स्पर्शक्ष पठचम: । मन्तव्यमथ बोद्धव्यं सप्तैते कर्महेतव:,गन्ध, रस, रूप, शब्द, पाँचवाँ स्पर्श तथा मन्तव्य और बोद्धव्य--ये सात विषय कर्मरूप हेतु हैं
gandho rasaś ca rūpaṃ ca śabdaḥ sparśaś ca pañcamaḥ | mantavyam atha boddhavyaṃ saptaite karmahetavaḥ ||
The Brahmin said: “Smell, taste, form, sound, and touch as the fifth—along with what is to be reflected upon and what is to be understood—these seven are the causes that set action in motion.”
ब्राह्मण उवाच
Actions (karma) arise from engagement with sense-objects (smell, taste, form, sound, touch) and from inner cognition—what one entertains in thought (mantavyam) and what one comes to know/understand (boddhavyam). Ethical living therefore requires vigilance over both the senses and the mind’s deliberation and understanding.
A Brahmin speaker is instructing the listener by enumerating the principal drivers of human action. The verse functions as a didactic listing within a broader moral-philosophical discourse in the Ashvamedhika Parva.