Asking permission to enter where one's father

Musa ibn Talha said, "I entered where my mother was with my father. He went in and I followed him. He turned and pushed me in the chest so that I fell on my bottom. Then he said, 'Will you enter without permission!'"

حَدَّثَنَا فَرْوَةُ، قَالَ: حَدَّثَنَا الْقَاسِمُ بْنُ مَالِكٍ، عَنْ لَيْثٍ، عَنْ عُبَيْدِ اللهِ، عَنْ مُوسَى بْنِ طَلْحَةَ قَالَ: دَخَلْتُ مَعَ أَبِي عَلَى أُمِّي، فَدَخَلَ فَاتَّبَعْتُهُ، فَالْتَفَتَ فَدَفَعَ فِي صَدْرِي حَتَّى أَقْعَدَنِي عَلَى اسْتِي، قَالَ: أَتَدْخُلُ بِغَيْرِ إِذْنٍ؟.