BG 17.21
यत्तु प्रत्युपकारार्थं फलमुद्दिश्य वा पुनः
दीयते च परिक्लिष्टं तद्राजसमुदाहृतम्
yattu pratyupakārārthaṃ phalamuddiśya vā punaḥ
dīyate ca parikliṣṭaṃ tadrājasamudāhṛtam
TRANSLATION
But that which is given as a consideration for something received or in expectation of future reward, or grudgingly, is called Rajasika gift.