Does the mention of curses and disbelief in the Hadiths imply apostasy without repentance, and how does this reconcile with Allah's saying: "Say, 'O My servants who have transgressed against themselves [by sinning], do not despair of the mercy of Allah. Indeed, Allah forgives all sins. Indeed, it is He who is the Forgiving, the Merciful'" (Quran 39:53)? And does "transgressed" here refer to ordinary sins or major sins, and how does one know that they have been subjected to a curse?

The cursing and disbelief mentioned in the Ahadith are intended to emphasize and strongly condemn the wrongdoing, and not to imply disbelief that expels one from the faith. Cursing is only for major sins. If a disobedient person repents with sincere repentance, the curse is lifted from him because its cause is removed. Allah may also prevent him from the Fire and the curse through repentance, seeking forgiveness, and performing good deeds. Therefore, there is no contradiction between the Ahadith that emphasize the prohibition of sins and the verse that encourages repentance and Allah's forgiveness.