Shiva Purana

siva.sh/siva-purana/uma-samhita/13/2

श्रुतेरध्ययनात्पुण्यं यदाप्नोति द्विजोत्तमः ।। तदध्यापनतश्चापि द्विगुणं फलमश्नुते ।। २ ।।

sanskrit

By teaching the Veda, an excellent brahmin attains twice the merit that he attains by studying it.

english translation

zruteradhyayanAtpuNyaM yadApnoti dvijottamaH || tadadhyApanatazcApi dviguNaM phalamaznute || 2 ||

hk transliteration by Sanscript