in his advice to Ibn Mas'ud said, ?O Ibn Mas'ud, increase in the acts of righteousness and good, for both the good [people] and the bad will regret; the good-doer will say, 'If only I had done more good!' And the bad-doer will say, 'I was negligent', and the evidence for this is the verse: And I swear by the self-blaming soul.?