﴿ وَٱتَّبِعُوٓا۟ أَحْسَنَ مَآ أُنزِلَ إِلَيْكُم مِّن رَّبِّكُم مِّن قَبْلِ أَن يَأْتِيَكُمُ ٱلْعَذَابُ بَغْتَةًۭ وَأَنتُمْ لَا تَشْعُرُونَ ﴾

“And ere that suffering comes upon you of a sudden, without your being aware [of its approach], follow the most goodly [teaching] that has been revealed unto you by your Sustainer,”

Then Allah said: (And follow the better (guidance) of that which is revealed unto you from your Lord) i.e. the Qur'an; make lawful that which it states to be lawful and unlawful that which it states to be unlawful, and act upon its clear verses and believe in its unclear verses, (before the doom cometh on you suddenly when ye know not) its coming,