Sahih Muslim 1390
صحيح مسلم#1390SahihAbdullah narrated it on the authority of his father Yahya:Knowledge cannot be acquired with sloth
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Every narration in Sahih Muslim is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 5:224