When you wearing leather shoes the whole world made of leather - who said it?

I know that Pema Chodron refers to this in _Bodhisattva Mind_ (at least the CD version of it) I don't know if it was Shantiveda (the book is about his writings _The Way of the Bodhisattva_) who said it or if Chodron was sharing the story of what someone else said. But it is definitely in this the recording of the seminar.