وَإِذَا ضَرَبْتُمْ فِى ٱلْأَرْضِ فَلَيْسَ عَلَيْكُمْ جُنَاحٌ أَن تَقْصُرُوا۟ مِنَ ٱلصَّلَوٰةِ إِنْ خِفْتُمْ أَن يَفْتِنَكُمُ ٱلَّذِينَ كَفَرُوٓا۟ ۚ إِنَّ ٱلْكَـٰفِرِينَ كَانُوا۟ لَكُمْ عَدُوًّا مُّبِينًا
wa-idhā ḍarabtum fī l-arḍi falaysa ʿalaykum junāḥun an taqṣurū mina l-ṣalati in khif'tum an yaftinakumu alladhīna kafarū inna l-kāfirīna kānū lakum ʿaduwwan mubīnan
When you [believers] are travelling in the land, you will not be blamed for shortening your prayers, if you fear the disbelievers may harm you: they are your sworn enemies.
And when you (Muslims) travel in the land, there is no sin on you if you shorten As-Salât (the prayer) if you fear that the disbelievers may put you in trial (attack you etc.), verily, the disbelievers are ever unto you open enemies.