قَالُوٓا۟ أَوَلَمْ نَنْهَكَ عَنِ ٱلْعَـٰلَمِينَ
Qaalooo awalam nanhaka 'anil 'aalameen
They answered, ‘Have we not told you not to interfere [between us and] anyone else?’
They said, "Have we not forbidden you from taking in anyone at all?"
The mob answers hospitality with a prior injunction: they had already forbidden Lut from sheltering anyone, so what is happening at his door follows a standing policy rather than a sudden impulse. Al-ʿālamīn in their question is sweeping, the whole world of people, and it shows a town that had made receiving a stranger an offence, and Lut resisting it long enough to have been warned once before.