Pathyapathyavinishcaya (Vishvanatha) 1.547

Pathyāpathyaviniścaya (Viśvanātha) 1.547

śītopahitarūkṣādīṃstīkṣṇādīn śītasaṃhitān
naro yatnena varṣāsu sarvānaitān vivarjayet