Charak Samhita
यदाऽनिलं प्रकृतिगं पित्तं कफपरिक्षये। संरुणद्धि तदा दाहः शूलं चास्योपजायते ॥४८॥
॥ 3. Normal vata, decreased kapha, and increased pitta sannipata॥ In a condition of grossly decreased kapha, when increased pitta obstructs the pathway of normal vata, causing burning sensation and coliky pain (shula)
english translation
yadA'nilaM prakRtigaM pittaM kaphaparikSaye। saMruNaddhi tadA dAhaH zUlaM cAsyopajAyate ॥48॥
hk transliteration by Sanscript