Al-Anfal 8:13

<h2>Slumber overcomes Muslims</h2><p>Allah reminds the believers of the slumber that He sent down on them as security from the fear they suffered from, because of the multitude of their enemy and the sparseness of their forces. They were given the same favor during the battle of Uhud, which Allah described,</p><p>ثُمَّ أَنزَلَ عَلَيْكُمْ مِّن بَعْدِ الْغَمِّ أَمَنَةً نُّعَاساً يَغْشَى طَآئِفَةً مِّنْكُمْ وَطَآئِفَةٌ قَدْ أَهَمَّتْهُمْ أَنْفُسُهُمْ</p><p>(Then after the distress, He sent down security for you. Slumber overtook a party of you, while another party was thinking about themselves. ) 3:154</p><p>Abu Talhah said, "I was among those who were overcome by slumber during (the battle of) Uhud. The sword fell from my hand several times, and I kept picking it up again, several times. I also saw the Companions' heads nodding while in the rear guard." Al-Hafiz Abu Ya`la narrated that `Ali said, "Only Al-Miqdad had a horse during Badr, and at some point, I found that all of us fell asleep, except the Messenger of Allah ﷺ. He was praying under a tree and crying until dawn." `Abdullah bin Mas`ud said, "Slumber during battle is security from Allah, but during prayer, it is from Shaytan." Qatadah said, "Slumber affects the head, while …

That is because they opposed Allah and His messenger. Whoso opposeth Allah and His messenger, (for him) lo! Allah is severe in punishment.

This because they contended against Allah and His Messenger: If any contend against Allah and His Messenger, Allah is strict in punishment.

This is because they defied and disobeyed Allah and His Messenger. And whoever defies and disobeys Allah and His Messenger, then verily, Allah is Severe in punishment.

That is because they opposed God and His Messenger. Whoever opposes God and His Messenger—God is severe in retribution.