Surabhi yields milk that is Sudha to those that live on Sudha and Svadha to those who subsist on Svadha and Amrita to those who feed on Amrita.
सुधारहारेषु च सुधां स्वधाभोजिषु च स्वधाम्। अमृतं चामृताशेषु सुरभी क्षरते पयः॥