Astanga Hrudaya
क्षीणस्यायम्य मन्ये वा सद्यो मुष्णाति जीवितम् । नाभिगुदान्तरं गत्वा वङ्क्षणौ वा समाश्रयन् ॥ १०५ ॥
or bending of the neck in an emaciated person is going to take away the life immediately vata getting localised in between the umbilicus and the rectum or located in the groin,
english translation
kSINasyAyamya manye vA sadyo muSNAti jIvitam । nAbhigudAntaraM gatvA vaGkSaNau vA samAzrayan ॥ 105 ॥
hk transliteration by Sanscript