Quran 4:101 from Surah An-Nisaa on Divine Marvels.
وَإِذَا ضَرَبۡتُمۡ فِي ٱلۡأَرۡضِ فَلَيۡسَ عَلَيۡكُمۡ جُنَاحٌ أَن تَقۡصُرُواْ مِنَ ٱلصَّلَوٰةِ إِنۡ خِفۡتُمۡ أَن يَفۡتِنَكُمُ ٱلَّذِينَ كَفَرُوٓاْۚ إِنَّ ٱلۡكَٰفِرِينَ كَانُواْ لَكُمۡ عَدُوّٗا مُّبِينٗا
English translation: And when you travel in the earth then not upon you (is) any blame that you shorten [of] the prayer if you fear that (may) harm you those who disbelieved Indeed the disbelievers are for you an enemy open
Transliteration: wa-idha darabtum fi al-ardi falaysa alaykum junahun an taqsuru mina al-salati in khif'tum an yaftinakumu alladhina kafaru inna al-kafirina kanu lakum aduwwan mubinan