﴿ إِن تُصِبْكَ حَسَنَةٌۭ تَسُؤْهُمْ ۖ وَإِن تُصِبْكَ مُصِيبَةٌۭ يَقُولُوا۟ قَدْ أَخَذْنَآ أَمْرَنَا مِن قَبْلُ وَيَتَوَلَّوا۟ وَّهُمْ فَرِحُونَ ﴾

“Should good fortune alight on thee, [O Prophet,] it will grieve them; and should misfortune befall thee, they will say [to themselves], "We have already taken our precautions beforehand!" - and will turn away, and will rejoice.”

If good fortune such as a victory or a taking of some spoils befalls you it vexes them; but if an affliction some hardship befalls you they say ‘We took our precaution judiciously — when we stayed behind — before’ before this act of disobedience; and they turn away rejoicing at what has afflicted you.