The principle of infādh al-waʿīd requires that punishment announced for sinful servants be carried out. Under this view, fulfilling the threat is made obligatory for Allah.
As described in this doctrine, pardon of the threatened sinner is not allowed, on the grounds that doing otherwise would conflict with the announced threat.
The Sunni creed affirms Allah as Forgiving and Merciful. His will and pardon are not constrained by a rule that every sinner must necessarily undergo punishment.