Surah An-Nur — Ayah 59 (24:59)
وَإِذَا بَلَغَ ٱلۡأَطۡفَٰلُ مِنكُمُ ٱلۡحُلُمَ فَلۡيَسۡتَـٔۡذِنُواْ كَمَا ٱسۡتَـٔۡذَنَ ٱلَّذِينَ مِن قَبۡلِهِمۡۚ كَذَٰلِكَ يُبَيِّنُ ٱللَّهُ لَكُمۡ ءَايَٰتِهِۦۗ وَٱللَّهُ عَلِيمٌ حَكِيمٞ ٥٩
English translation (Saheeh International)
And when the children among you reach puberty, let them ask permission [at all times] as those before them have done. Thus does Allāh make clear to you His verses; and Allāh is Knowing and Wise.
Brief commentary
When your children reach the age of puberty they should seek permission at all times before entering into your homes, as has been mentioned regarding the adults previously. Just as Allah makes clear the rulings of seeking permission for you, He also makes His verses clear. And Allah is ever-aware of the requirements of His servants; wise in whatever laws He passes for them.