Tama Action is that which is performed from delusion, without regard to consequences and with one's own loss and injury as well as of others.
अनुबन्धं क्षयं हिंसामनवेक्ष्य च पौरुषम्। मोहादारभ्यते कर्म यत्तत् तामसमुच्यते॥