Brihat Parashara Hora Shastra
क्रमाद् बालः कुमारोऽथ युवा वृद्धस्तथा मृतः । षडंशैरसमे खेटः समे ज्ञेयो विपर्ययात् ॥ ३॥
Baal, Kumar, Yuv, Vriddh and Mrit Avastha (Baal Adi Avasthas). Infant, youthful, adolescent, old and dead are the states of the Grahas, placed in the ascending order at the rate of six degrees in odd Rāśis. In the case of even Rāśis this arrangement is in reverse order. (Vriddh - Advanced, Mrit - In extremis)
english translation
kramAd bAlaH kumAro'tha yuvA vRddhastathA mRtaH । SaDaMzairasame kheTaH same jJeyo viparyayAt ॥ 3॥
hk transliteration by Sanscript