وَإِذَآ أَذَقۡنَا ٱلنَّاسَ رَحۡمَةٗ مِّنۢ بَعۡدِ ضَرَّآءَ مَسَّتۡهُمۡ إِذَا لَهُم مَّكۡرٞ فِيٓ ءَايَاتِنَاۚ قُلِ ٱللَّهُ أَسۡرَعُ مَكۡرًاۚ إِنَّ رُسُلَنَا يَكۡتُبُونَ مَا تَمۡكُرُونَ ٢١
And when We give the people a taste of mercy after adversity has touched them, at once they conspire against Our verses. Say, "Allāh is swifter in strategy." Indeed, Our messengers [i.e., angels] record that which you conspire.
Translation: Saheeh International (English)
Each word's meaning and sound
If Allah makes the idolaters experience some mercy, such as rain and abundance after drought and suffering, they start to plot and scheme in rejection of Allah’s signs. Say O Messenger to these idolaters, that Allah is quicker at plotting and in enticing and luring them, and quicker in dealing His Punishment. The angels record what they plan in the way of scheming, and nothing escapes them, so how could it escape their Creator? Allah will repay them for their scheming.
Al-Mukhtasar in interpreting the Noble Quran