Will people have a severe punishment if they forget the Day of Reckoning by wandering astray from the straight path of God?

 

Verse 26 of Chapter 38

O David! We did indeed make thee a vicegerent on earth: so judge thou between men in truth (and justice): Nor follow thou the lusts (of thy heart), for they will mislead thee from the Path of Allah: for those who wander astray from the Path of Allah, is a Penalty Grievous, for that they forget the Day of Account.