Sahih Muslim 4839
صحيح مسلم#4839SahihIt has been narrated on the authority of Ibn 'Umar who said:The Messenger of Allah (ﷺ) forbade that one should travel to the land of the enemy taking the Qur'an with him
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: 33:135