Full Idea
It is superfluous to suppose that what can be accounted for by a few principles has been produced by many.
Gist of Idea
Supposing many principles is superfluous if a few will do it
Source
Thomas Aquinas (Summa Theologicae [1265], Ia,Q02,Art3,Ob2)
Book Reference
'The Existence of God', ed/tr. Hick,John [Macmillan 1964], p.82
A Reaction
Notice that this is 'superfluous' rather than 'wrong'. But ten people can lift a piano which could have been lifted by eight. Note that this is 150 years before Ockham.