Gita Chapter 18.31 to 18.35

Yayaa dharmamadharmam cha kaaryam chaakaaryameva cha;
Ayathaavat prajaanaati buddhih saa paartha raajasee.
31. That by which one incorrectly understands Dharma and Adharma, and also what ought to be done and what ought not to be done—that intellect, O Arjuna, is Rajasic!
COMMENTARY: That which is ordained in the scriptures is Dharma. That which hurls you into the abyss of ignorance is Adharma. The Rajasic intellect is not able to distinguish between righteous and unrighteous actions.

Adharmam dharmamiti yaa manyate tamasaavritaa;
Sarvaarthaan vipareetaamshcha buddhih saa paartha taamasee.
32. That which, enveloped in darkness, views Adharma as Dharma and all things perverted—that intellect, O Arjuna, is called Tamasic!

Dhrityaa yayaa dhaarayate manah praanendriyakriyaah;
Yogenaavyabhichaarinyaa dhritih saa paartha saattwikee.
33. The unwavering firmness by which, through Yoga, the functions of the mind, the life-force and the senses are restrained—that firmness, O Arjuna, is Sattwic!

Yayaa tu dharmakaamaarthaan dhrityaa dhaarayate’rjuna;
Prasangena phalaakaangkshee dhritih saa paartha raajasee.
34. But that firmness, O Arjuna, by which, on account of attachment and desire for reward, one holds fast to Dharma, enjoyment of pleasures and earning of wealth—that firmness, O Arjuna, is Rajasic!

Yayaa swapnam bhayam shokam vishaadam madameva cha;
Na vimunchati durmedhaa dhritih saa paartha taamasee.
35. That by which a stupid man does not abandon sleep, fear, grief, despair and also conceit—that firmness, O Arjuna, is Tamasic!

Gita Chapter 17.06 to 17.10

Karshayantah shareerastham bhootagraamamachetasah;
Maam chaivaantahshareerastham taanviddhyaasuranishchayaan.
6. Senseless, torturing all the elements in the body and Me also, who dwells in the body,—know thou these to be of demoniacal resolves.

Aahaarastwapi sarvasya trividho bhavati priyah;
Yajnastapastathaa daanam teshaam bhedamimam shrinu.
7. The food also which is dear to each is threefold, as also sacrifice, austerity and alms-giving. Hear thou the distinction of these.
COMMENTARY: A man’s taste for a particular food is determined according to the Guna prevalent in him.

Aayuh sattwabalaarogya sukha preetivi vardhanaah;
Rasyaah snigdhaah sthiraa hridyaa aahaaraah saattwikapriyaah.
8. Foods which increase life, purity, strength, health,joy and cheerfulness, which are oleaginous and savoury, substantial and agreeable, are dear to the Sattwic people.

Katvamlalavanaatyushna teekshna rooksha vidaahinah;
Aahaaraah raajasasyeshtaa duhkhashokaamayapradaah.
9. The foods that are bitter, sour, saline, excessively hot, dry, pungent and burning, are liked by the Rajasic and are productive of pain, grief and disease.

Yaatayaamam gatarasam pooti paryushitam cha yat;
Ucchishtamapi chaamedhyam bhojanam taamasapriyam.
10. That which is stale, tasteless, putrid, rotten and impure refuse, is the food liked by the Tamasic.