Bhagavad Gita 17.21

यत्तु प्रत्युपकारार्थं फलमुद्दिश्य वा पुनः।दीयते च परिक्लिष्टं तद्दानं राजसं स्मृतम् ॥१७.२१॥

yattu pratyupakārārthaṃ phalamuddiśya vā punaḥdīyate ca parikliṣṭaṃ taddānaṃ rājasaṃ smṛtam

And, that gift which is given with the intention of receiving something in return, or expecting a reward, or begrudgingly, is considered to be Rajasic.

गीता