Astanga Hrudaya
द्वादशद्विगुणाः पृष्ठे पृष्ठवंशस्य पार्श्वयोः। द्वे द्वे तत्रोर्ध्वगामिन्यौ न शस्त्रेण परामृशेत्॥२३॥
of them one on either side going upwards should be avoided in the prsrtha (back) these are two times of twelve i.e. twenty-four in number on either side of the virtual column; among them two watch on either side going upwards should not be touched by the sharp instruments in the jathara (abdomen) their number is same as in the back;
english translation
dvAdazadviguNAH pRSThe pRSThavaMzasya pArzvayoH। dve dve tatrordhvagAminyau na zastreNa parAmRzet॥23॥
hk transliteration by Sanscript