Full Idea
The prima facie duties are of fidelity, gratitude, justice, beneficence (the act, rather than the motive), self-improvement, and non-maleficence.
Clarification
'Beneficence' helps others, and 'maleficence' harms them
Gist of Idea
Be faithful, grateful, just, beneficent, non-malevolent, and improve yourself
Source
report of W. David Ross (The Right and the Good [1930], §II) by PG - Db (ideas)
Book Reference
Ross,W.David: 'The Right and the Good' [OUP 1930], p.21
A Reaction
I admire anyone who has the courage to make a statement like this. A thousand analytical philosophers sharpen their knives for the attack, all armed with Cartesian or empirical scepticism. But to deny these duties is to drop out of society.