Hadithcore
Al-Adab Al-Mufrad, 1058
sahih· Al-Albani

Ibn 'Umar reported that when his children had reached puberty and he had withdrawn to his room, none of them entered where he was except with his permission.

حَدَّثَنَا مَطَرُ بْنُ الْفَضْلِ، قَالَ‏:‏ حَدَّثَنَا يَزِيدُ بْنُ هَارُونَ، عَنْ هِشَامٍ الدَّسْتُوَائِيِّ، عَنْ يَحْيَى بْنِ أَبِي كَثِيرٍ، عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ، أَنَّهُ كَانَ إِذَا بَلَغَ بَعْضُ وَلَدِهِ الْحُلُمَ عَزَلَهُ، فَلَمْ يَدْخُلْ عَلَيْهِ إِلا بِإِذْنٍ‏.‏

References2 variants
In-Book Reference
Book 43, Hadith 8
English Reference
Book 43, Hadith 1058