Astanga Hrudaya
एकैकवृद्धिसमताक्षयैः षट् ते पुनश्च षट्। एकक्षयद्वन्द्ववृद्ध्या सविपर्यययाऽपि ते॥७७॥
In the combination of increase, normal and decrease of one dosha each will make up for 6 numbers Again they are 6 in the combination of decrease of 1 dosha and increase of 2 doshas
english translation
ekaikavRddhisamatAkSayaiH SaT te punazca SaT। ekakSayadvandvavRddhyA saviparyayayA'pi te॥77॥
hk transliteration by Sanscript