A righteous child who seeks forgiveness for him. The holy scripture which will be recited from. The tree which he had planted. The charity of water that he had caused to flow. Verily, a servant can gain the rank of he who both fast during te day and keeps vigil at night, keeping up prayers, through his good disposition.
Anger spoils faith as much as vinegar spoils honey.
So Allah, Almighty and Glorious, they are right and He will let them enter Heaven.