9:51
قُل لَّن يُصِيبَنَآ إِلَّا مَا كَتَبَ ٱللَّهُ لَنَا هُوَ مَوْلَىٰنَا ۚ وَعَلَى ٱللَّهِ فَلْيَتَوَكَّلِ ٱلْمُؤْمِنُونَ
Say, "Never will we be struck except by what Allah has decreed for us; He is our protector." And upon Allah let the believers rely.
Translation · Saheeh International
Tafsir
Ibn Kathīr (abridged)
Allah emphasizes the enmity that the hypocrites have for the Prophet
If a blessing, such as victory and triumph over the enemies, is given to the Prophet , thus pleasing him and his Companions, it grieves the hypocrites,
وَإِن تُصِبْكَ مُصِيبَةٌ يَقُولُواْ قَدْ أَخَذْنَا أَمْرَنَا مِن قَبْلُ
(but if a calamity overtakes you, they say: "We took our precaution beforehand,"), they say, we took precautions when we did not join him,
وَيَتَوَلَّواْ وَّهُمْ فَرِحُونَ
(and they turn away rejoicing.) Allah directed His Prophet to reply to the perfect enmity they have towards him,