Bhagavad Gita 18.28

अयुक्तः प्राकृतः स्तब्धः शठो नैष्कृतिकोऽलसः।विषादी दीर्घसूत्री च कर्ता तामस उच्यते॥

ayuktaḥ prākṛtaḥ stabdhaḥ śaṭho naiṣkṛtiko'lasaḥ |viṣādī dīrghasūtrī ca kartā tāmasa ucyate ||

Unsteady, vulgar, inflexible, deceitful, malicious, lazy, despondent, and procrastinating—such an agent is called Tamasic.

While he whose purpose is weak, who is low-minded, stubborn, dishonest, malicious, lazy, despondent, and procrastinating—he may be assumed to be in darkness.

Our plain-language meaning of this verse is waiting for scholar review.