Astanga Hrudaya
मूत्रस्नाव्येकतो भिन्ने व्रणो रोहेच्च यत्नतः। देहामपक्वस्थानानां मध्ये सर्वसिराश्रयः॥१२॥
If it is injured on one side and an ulcer develops through which urine flows out, it heals with difficulty after great effort (treatment). In the body, in between the stomach (ama-sthana) and large intestine (pakva-sthana) is the nabhi, the seat of all the siras (veins).
english translation
mUtrasnAvyekato bhinne vraNo rohecca yatnataH। dehAmapakvasthAnAnAM madhye sarvasirAzrayaH॥12॥
hk transliteration by Sanscript