It is true that who does wrong with others he wrongs himself, but wronging oneself is as killing it.

( ثُمَّ يَسْتَغْفِرِ اللَّهَ يَجِدِ اللَّهَ غَفُورًا رَّحِيمًا … ) (…then seeks forgiveness of Allah will find Allah Forgiving and Merciful): As long as the man is asking for forgiveness and he is honest in his repentance and he is truthful in deciding not to commit the sin once again, then he will Allah (swt) Forgiving and Merciful, forgives the sins in the hereafter.