What is the source of Pascal's quotation on staying home peacefully?

Pascal wrote in *Pensées* S168/L136 : >all of man's unhappiness arises from one thing alone, that he does not know how to remain at rest in a room. A man that has enough to live, if he knew how to remain by himself happily, would not go abroad or lay a siege. > >*tout le malheur des hommes vient d’une seule chose, qui est de ne savoir pas demeurer en repos dans une chambre. Un homme qui a assez de bien pour vivre, s’il savait demeurer chez soi avec plaisir, n’en sortirait pas pour aller sur la mer ou au siège d’une place.* > >Ariew's transl. : "man's unhappiness arises from one thing alone: that he cannot remain quietly in his room. A man who has enough to live on would not go to sea or lay a siege, if he knew how to enjoy staying at home." I read a quotation from a saint (St. Bruno?) along these same lines. What was it?