Ash-Shams Verse 12

when the most wicked of them was roused ˹to kill the she-camel˺.

when the most wretched among them rose [to kill the camel].

when the most wretched of them uprose,

when the most wicked man among them rose [against him].

What time the greatest wretch of them rose up.

Behold, the most wicked man among them was deputed (for impiety).

when their arch-criminal rose up in rage.

When among them the great wretch arose,

When the most wicked among them stood up in defiance.

when the most wretched of them rose up.

(Especially) when (finally) the most wicked among them (instigated by his people) rushed forward.

(It was) when the wretched-most among them arose,

When/if its most miserable/unhappy stirred up/urged .

When the most wicked among them stood up in defiance.

When the basest of them rose up

When the most wicked man among them went forth (to kill the she-camel).

So Allah’s messenger said to them: (Leave alone) Allah’s she-camel, and (give) her (to) drink.

When the most unfortunate of them broke forth with

When the basest of them broke forth

when the most corrupt of them incited them (to commit evil).

when the most wicked of them broke forth,

When their most wicked went forth.

when the most wicked man among them rose up.

When it followed its most wicked.

when the most wretched of them, whose name was Qudr, was dispatched, [when] he hastened, in order to hamstring the she-camel with their approval.

When their most wicked went forth.

meaning, the most wicked person of the tribe, and he was Qudar bin Salif, the one who killed the she-camel. He was leader of the tribe of Thamud, and he is the one whom Allah refers to in His saying,

فَنَادَوْاْ صَـحِبَهُمْ فَتَعَاطَى فَعَقَرَ

But they called their comrade and he took (a sword) and killed (her). (54;29)

This man was mighty and respected among his people. He was of noble lineage and a leader who was obeyed.

This is just as Imam Ahmad recorded from `Abdullah bin Zam`ah. He said that the Messenger of Allah gave a sermon in which he mentioned the she-camel and he mentioned the man who killed her. Then he said,
إِذِ انبَعَثَ أَشْقَـهَا
(When their most wicked went forth.)

انْبَعَثَ لَهَا رَجُلٌ عَارِمٌ عَزِيزٌ مَنِيعٌ فَي رَهْطِهِ مِثْلُ أَبِي زَمْعَة

A strong and mighty man who was invincible among his tribe, like Abu Zam`ah, went forth to her.

This Hadith was recorded by Al-Bukhari in his Book of Tafsir, and Muslim in his Book of the Description of the Hellfire.

At-Tirmidhi and An-Nasa'i both recorded it in their Sunans in their Books of Tafsir.
The Story of Salih's She-Camel

Allah then says