فَإِذَا جَاءَ أَجَلُهُمْ لَا يَسْتَأْخِرُونَ سَاعَةً وَلَا يَسْتَقْدِمُونَ
When their appointed term comes, they can neither delay it for an hour nor advance it. (Qur’an 7:34)
This verse is used to establish an appointed term. A death does not occur outside divine knowledge and decree. Everyday causes—illness, accident, or killing—still occur as events within the world.
It would be wrong to infer that a sinful killing removes death from divine power. It would also be wrong to infer that a divinely known time of death exempts the killer from religious and legal responsibility.