In the loṭ (Imperative Mood) ām is substituted for what would have substituted otherwise e by ṭita ātmanepadānāṃ ṭere [[3.4.79]].,
This relates to the Atmanepada affix ए. In the Atmanepada, आम् is substituted for ए in the Imperative; see the table; पचताम्, पचेताम्, पचन्ताम् ।,