Bhagavad Gita Chapter 17 Verse 21

Gita 17.21

यत्, तु, प्रत्युपकारार्थम्, फलम्, उद्दिश्य, वा, पुनः,
दीयते, च, परिक्लिष्टम्, तत्, दानम्, राजसम्, स्मृतम्।।21।।

Gita 17.21

Yat’, tu, pratyupkaaraarthm’, falam’, uddishya, va, punH,
Deeyate, ch, pariklishtam’, tat’, daanm’, raajsam’, smritam’ ||21||

Translation: (Tu) but (yat’) a charity which (pratyupkaaraarthm’) for receiving benefit in return (va) or (punH) again (falam’) reward (uddishya) with the aim (deeyate) is given (ch) and (pariklishtam’) with dissension i.e. with an unhappy mind on giving donation (tat’) that (daanm’) charity (raajsam’) Rajas (smritam’) is said to be. (21)

Translation: But a charity which is given for receiving benefit in return or with the aim of getting reward and with dissension i.e. with an unhappy mind on giving donation, that charity is said to be Rajas.