The Day whereon neither wealth nor sons will avail,means, a man's wealth will not protect him from the punishment of Allah, even if he were to pay a ransom equivalent to an earth full of gold.وَلَا بَنُونَ (nor sons),means, `or if you were to pay a ransom of all the people on earth.'On that Day nothing will be of any avail except faith in Allah and sincere devotion to Him, and renunciation of Shirk and its people.Allah says:إِلاَّ مَنْ أَتَى اللَّهَ بِقَلْبٍ سَلِيمٍ