It 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

It has been narrated on the authority of Abdullah b. Umar that the Messenger of Allah (ﷺ) used to forbid that one should travel to the land of the enemy taking the Qur'an (with him) lest it should fall into the hands of the enemy

It has been narrated on the authority of Ibn 'Umar that the Messenger of Allah (ﷺ) said:Do not take the Qur'an on a journey with you, for I am afraid lost it should fall into the hands of the enemy. Ayyub (one of the narrators in the chain of transmitters) said: The enemy may seize it and may quarrel with you over it

The above hadith has been narrated through several other chains with slight differences of wording