Jami` at-Tirmidhi Book 27, Hadith 3
the Prophet said: "The Lord's pleasure is in the parent's pleasure, and the Lord's anger is in the parent's anger."(Hasan).
"I asked the Messenger of Allah: 'O Messenger of Allah! Which is the most virtuous of deeds?' He said: 'Salat during its appropriate time.' I said: 'Then what, O Messenger of Allah?' He said: 'Being dutiful to one's parents.' I said: 'Then what, O Messenger of Allah?' He said: 'Jihad in the cause of Allah.' Then the messenger of Allah was silent, and if I had asked him more, he would have told me more.'"
He said that a man came and said : "I have a wife whom my mother has ordered me to divorce." So Abu Ad-Darda said: " I heard the Messenger of Allah saying: 'The father is the middle gate to Paradise. So if you wish, then neglect that door, or protect it.'"