"I studied adab for thirty years"

Ibn Al-Jawzi writes:

قال عبد الله بن المبارك طلبت الأدب ثلاثين سنة , وطلبت العلم عشرين سنة

ENGLISH:

"Abdullah Ibn Al-Mubarak said: "I studied adab (manners) for thirty years and I studies ilm (knowledge) for twenty years".

NEDERLANDS:

"Abdullah Ibn Al-Mubarak zei: “Ik heb dertig jaar lang Adab (manieren) gestudeerd en twintig jaar lang (Ilm) kennis”.

["Ghaytu al-Nihaya", 1/466].