shakawtu ilā wakīyin sū-a hifžī
fa arshadanī ila tarki’l máāşī
wa akhbaranī bi anna’l ílma nūrun
wa nūrullāhi lā yuhdā li áāşī

i complained to wakiy of a failing memory
he advised me to stay away from sins
and told me that knowledge is a light
and a sinner is not guided to this light
 

These lines are attributed to Imām Shāfiýī, in his Diwan.