What is the reward for parents whose son memorizes the Qur'an?

"Whoever recites the Quran, learns it, and acts upon it, will be adorned on the Day of Resurrection with a crown of light whose radiance is like the radiance of the sun. His parents will be clothed with two garments that the world cannot equal, and it will be said to them: 'Because your child embraced the Quran.' And whoever recites the Quran and acts according to what is in it, his parents will be adorned with a crown on the Day of Resurrection whose light is like the light of the sun in the homes of this world."