وَإِذَا ضَرَبۡتُمۡ فِي ٱلۡأَرۡضِ فَلَيۡسَ عَلَيۡكُمۡ جُنَاحٌ أَن تَقۡصُرُواْ مِنَ ٱلصَّلَوٰةِ إِنۡ خِفۡتُمۡ أَن يَفۡتِنَكُمُ ٱلَّذِينَ كَفَرُوٓاْۚ إِنَّ ٱلۡكَٰفِرِينَ كَانُواْ لَكُمۡ عَدُوّٗا مُّبِينٗا

Wa izaa darabtum fil ardi falaisa 'alaikum junaahun an taqsuroo minas Salaati in khiftum ai yaftinakumul lazeena kafarooo; innal kaafireena kaanoo lakum aduwwam mubeenaa

When ye travel through the earth, there is no blame on you if ye shorten your prayers, for fear the Unbelievers May attack you: For the Unbelievers are unto you open enemies.

— An-Nisa' (ٱلنِّسَاء), 4:101