Manusmriti

siva.sh/manusmriti/12/35

यत् कर्म कृत्वा कुर्वंश्च करिष्यंश्चैव लज्जति । तज् ज्ञेयं विदुषा सर्वं तामसं गुणलक्षणम् ॥ ३५ ॥

sanskrit

When a (man), having done, doing, or being about to do any act, feels ashamed, the learned may know that all (such acts bear) the mark of the quality of Darkness.

english translation

yat karma kRtvA kurvaMzca kariSyaMzcaiva lajjati | taj jJeyaM viduSA sarvaM tAmasaM guNalakSaNam || 35 ||

hk transliteration by Sanscript