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حَدَّثَنَا يَحْيَى بْنُ يَحْيَى، قَالَ قَرَأْتُ عَلَى مَالِكٍ عَنْ نَافِعٍ، عَنْ عَبْدِ اللَّهِ بْنِ عُمَرَ، قَالَ نَهَى رَسُولُ اللَّهِ صلى الله عليه وسلم أَنْ يُسَافَرَ بِالْقُرْآنِ إِلَى أَرْضِ الْعَدُوِّ .
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.
USC-MSA web (English) reference