Expiation for Undutifulness to Parents

Question:
Umm Salim says: Shaykh, is there an expiation or a righteous deed that a Muslim can do to atone for undutifulness to his mother or father, so that Allah may be pleased with him?

Answer:
If his father is alive, he should ask him for forgiveness and turn away from undutifulness toward dutifulness. If he is dead, he should increase his supplication for him, seek forgiveness for him, and give charity on his behalf. By doing so, Allah the Mighty and Majestic may erase what he did against his parents or one of them.
Likewise, one should be kind to their friends, because the Messenger (peace and blessings be upon him), when asked what remains of dutifulness to parents after their death, said: maintaining family ties and being kind to their friends, along with making supplication for them, giving charity on their behalf, and performing Hajj and 'Umrah for them. All of this, if Allah accepts it, reaches the deceased and the deceased benefits from it. Yes.