Astanga Hrudaya
द्वे द्वे कटिकतरुणे शस्त्रेणाष्टौ स्पृशेन्न ताः। पार्श्वयोः षोडशैकैकामूर्ध्वगां वर्जयेत्तयोः॥२२॥
two each in both vanksana (groins), two each in both katikataruna (crest of pelvic bone); these eight should not be touched by the sharp instrument (of vensection).
english translation
dve dve kaTikataruNe zastreNASTau spRzenna tAH। pArzvayoH SoDazaikaikAmUrdhvagAM varjayettayoH॥22॥
hk transliteration by Sanscript