Shiva Purana
उपकारो हि साधूनां सुखाय किल संमतः ॥ उपकारो ह्यसाधूनामपकाराय केवलम् ॥ ४५ ॥
Help rendered to good men is accepted as conducive to happiness. Help rendered to bad men is conclusive to offence.
english translation
upakAro hi sAdhUnAM sukhAya kila saMmataH ॥ upakAro hyasAdhUnAmapakArAya kevalam ॥ 45 ॥
hk transliteration by Sanscript