al-Khateeb al-Bhagdaadi 463 AH collected a narration in which ‘Abdullah bin al-Mu’taz said, علم بلا عمل كشجرة بلا ثمرة “Knowledge without action is like a tree without fruit”. Source: “Knowledge Mandates Action” point number 46
al-Khateeb al-Bhagdaadi 463 AH narrates that some of the salaf said, لا ينال هذا العلم الا من عطل داكانه, و خرب بستانه, و هجر اخوانه, و مات أقرب أهله فلم يشهد جنازته “No one will attain this knowledge except one who shuts down his store, destroys his garden, abandons his brothers, and (when) his closest…
Trying to Follow the Salaf 