Quran Az-Zumar 39:55
وَٱتَّبِعُوٓاْ أَحۡسَنَ مَآ أُنزِلَ إِلَيۡكُم مِّن رَّبِّكُم مِّن قَبۡلِ أَن يَأۡتِيَكُمُ ٱلۡعَذَابُ بَغۡتَةٗ وَأَنتُمۡ لَا تَشۡعُرُونَ ٥٥
Translation
And follow the best of what was revealed to you from your Lord [i.e., the Qur’ān] before the punishment comes upon you suddenly while you do not perceive,