These verses are grouped by theme as a starting point — not as standalone rulings. A verse takes on its full meaning only in context: the verses before and after, the occasion of revelation (asbāb al-nuzūl) and the explanation of the scholars. So read each verse in full via the tafsir, and consult a qualified scholar when in doubt.
مَآ أَصَابَ مِن مُّصِيبَةٍۢ فِى ٱلْأَرْضِ وَلَا فِىٓ أَنفُسِكُمْ إِلَّا فِى كِتَٰبٍۢ مِّن قَبْلِ أَن نَّبْرَأَهَآ ۚ إِنَّ ذَٰلِكَ عَلَى ٱللَّهِ يَسِيرٌۭ
No calamity befalls earth or yourselves except that it was already recorded.
مَآ أَصَابَ مِن مُّصِيبَةٍ إِلَّا بِإِذْنِ ٱللَّهِ ۗ وَمَن يُؤْمِنۢ بِٱللَّهِ يَهْدِ قَلْبَهُۥ ۚ وَٱللَّهُ بِكُلِّ شَىْءٍ عَلِيمٌۭ
No calamity strikes (a person) except by Allah's permission.