Sahih Muslim 4826
صحيح مسلم#4826SahihIt has been reported on the authority of Mujashi' b. Mas'ud as-Sulami who said:I came to the Prophet (ﷺ) to offer him my pledge of migration. He said: The period of migration has expired (and those who wereto get the reward for this great act of devotion have got it). You may now give your pledge to serve the cause of Islam, to strive in the way of Allah and to follow the path of virtue
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: 33:122