Bhagavad Gita 18.22 Chapter 18, Verse 22

यत्तु कृत्स्नवदेकस्मिन्कार्ये सक्तमहैतुकम् ।
अतत्त्वार्थवदल्पं च तत्तामसमुदाहृतम् ॥१८.२२॥

yattu kṛtsnavadekasminkārye saktamahaitukam
atattvārthavadalpaṃ ca tattāmasamudāhṛtam

Meaning

Knowledge that clings to a single effect as if it were the whole, without reason, without grasping the truth, and narrow — that is declared tamasic.

Newly written by Bhajan Dhun — scholarly review in progress.

Reference: Bhagavad Gita 18.22 (Chapter 18, Liberation through Renunciation (Moksha Sannyasa Yoga), Verse 22)