رِضَى الرَّبِّ فِي رِضَى الْوَالِدِ، وَسَخَطُ الرَّبِّ فِي سُخْطِ الْوَالِدِ (Tirmidhi)
Translation: Allah's pleasure is linked with the father's pleasure, and His displeasure with the father's displeasure.
رِضَى — pleasure or approval; الرَّبِّ — of the Lord; الْوَالِدِ — of the father; سَخَطُ — displeasure.
Brief grammar: Both رِضَى الرَّبِّ and رِضَى الْوَالِدِ are iḍāfah constructions. فِي is a preposition followed by a genitive noun.
The teaching emphasizes honoring and caring for one's father in legitimate matters. The wording here names the father; it does not reduce the rights of mothers.