What will grieve you the most on the day of judgement:
Certainly you will not be able to give your father, or your mother, or even your children… even one single good deed despite your most intense love for them…!!
But surely you are going to suffer the loss of having to give away these good deeds to the person you disliked so you insulted him or you backbited him or slandered him…!!
That’s why it has been named the day of “Attaghaabun”… (the day of mutual loss and gain)!!