Hazrat Saad bin Masood narrates that Hazrat Ibn Abbas (may Allah be pleased with them) said: If a Muslim’s parents are alive and he spends the morning treating both of them well, Allah opens two doors of Paradise for him. And if any Muslim spends the evening treating both of them badly, Allah opens two doors of Hell for him. And if either one of them is displeased with him, Allah is not pleased with him until he pleases the one who is displeased. The narrator says: I asked,“Even if both of them are unjust?”He replied:“Yes, even if both of them are unjust.”