When he was a child, a Muslim brother's mother would curse him when she was angry with him owing to his naughtiness with words like "May you always cry in your life," and other such strong curses. Today he is in his 40s and, though he is a very talented and hard-working man, he is unable to move out of a financial quagmire despite all efforts on his part. For the most part of his adult life he has been unhappy with little respite and has been beset by ongoing personal and financial problems almost ceaselessly.
In retrospect, he strongly feels that these circumstances came about owing to the curses of his mother, who loved him dearly but during momentary anger would curse him, and a mother's duas for her child, even if they are destructive, are accepted by Allah. Now his mother is no more and he desperately wants to overcome the ill effects of those curses but is unable to do so and his circumstances refuse to change. Is there a way out for him? Can someone please give an answer based on the strong references and evidences only?