✅ Answer: Please consider the following narrations:

1⃣عَنْ عَبْدِ اللَّهِ بْنِ مَیْمُونٍ عَنْ جَعْفَرِ بْنِ مُحَمَّدٍ عَنْ أَبِیهِ عَنْ آبَائِهِ قَالَ: قَالَ رَسُولُ اللَّهِ الصَّبِیُّ وَ الصَّبِیُّ وَ الصَّبِیُّ وَ الصَّبِیَّةُ وَ الصَّبِیَّةُ وَ الصَّبِیَّةُ یُفَرَّقُ بَیْنَهُمْ فِی الْمَضَاجِعِ لِعَشْرِ سِنِینَ.

📚 Al-Faqih, Vol. 3, p. 436

Imam Sadiq (peace be upon him) narrated from his father and ancestors that the Messenger of Allah (peace be upon him and his family) said: Boys and boys, and boys and girls, and girls and girls, should be separated in dormitories from the age of ten.

2⃣قَالَ وَ رُوِیَ أَنَّهُ یُفَرَّقُ بَیْنَ الصِّبْیَانِ فِی الْمَضَاجِعِ لِسِتِّ سِنِینَ.

📚 Al-Faqih, Vol. 3, p. 436

Sheikh Saduq said: It is narrated that at the age of six, children's dormitories should be separated.

3⃣عَنْ جَعْفَرِ بْنِ مُحَمَّدٍ الْأَشْعَرِیِّ عَنِ ابْنِ الْقَدَّاحِ عَنْ جَعْفَرِ بْنِ مُحَمَّدٍ عَنْ آبَائِهِ قَالَ: یُفَرَّقُ بَیْنَ النِّسَاءِ وَ الصِّبْیَانِ فِی الْمَضَاجِعِ إِذَا بَلَغُوا عَشْرَ سِنِینَ

📚 Al-Khisal, p. 439, Hadith 30

Imam Sadiq (peace be upon him) narrated from his ancestors that they said: There should be separation between women and children in dormitories when children reach the age of ten.

4⃣عِدَّةٌ مِنْ أَصْحَابِنَا عَنْ أَحْمَدَ بْنِ مُحَمَّدٍ عَنْ أَبِی مُحَمَّدٍ الْمَدَائِنِیِّ عَنْ عَلِیِّ بْنِ حَبِیبٍ بَیَّاعِ الْهَرَوِیِّ قَالَ حَدَّثَنِی عِیسَی بْنُ زَیْدٍ عَنْ أَبِی عَبْدِ اللَّهِ قَالَ قَالَ أَمِیرُ الْمُؤْمِنِینَ صَلَوَاتُ اللَّهِ عَلَیْهِ یَثَّغِرُ الصَّبِیُّ لِسَبْعٍ وَ یُؤْمَرُ بِالصَّلَاةِ لِتِسْعٍ وَ یُفَرَّقُ بَیْنَهُمْ فِی الْمَضَاجِعِ لِعَشْرٍ وَ یَحْتَلِمُ لِأَرْبَعَ عَشْرَةَ وَ یَنْتَهِی طُولُهُ لِإِحْدَی وَ عِشْرِینَ سَنَةً وَ یَنْتَهِی عَقْلُهُ لِثَمَانٍ وَ عِشْرِینَ إِلَّا التَّجَارِبَ.

📚 Al-Kafi, Vol. 7, p. 69

Imam Sadiq (peace be upon him) said: Amir al-Mu’minin (peace be upon him) said: A child's teeth fall out at seven years old, they are commanded to pray at nine, separation in dormitories occurs at ten, they reach puberty at fourteen, their height reaches its peak at twenty-one, and their intellect reaches its peak at twenty-eight, apart from experiences!

5⃣عَنْ عَلِیِّ بْنِ إِبْرَاهِیمَ عَنْ أَبِیهِ وَ عَنْ عِدَّةٍ مِنْ أَصْحَابِنَا عَنْ سَهْلِ بْنِ زِیَادٍ عَنْ جَعْفَرِ بْنِ مُحَمَّدٍ الْأَشْعَرِیِّ عَنِ ابْنِ الْقَدَّاحِ عَنْ أَبِی عَبْدِ اللَّهِ قَالَ: یُفَرَّقُ بَیْنَ الْغِلْمَانِ وَ بَیْنَ النِّسَاءِ فِی الْمَضَاجِعِ إِذَا بَلَغُوا عَشْرَ سِنِینَ.

📚 Al-Kafi, Vol. 6, p. 47

Imam Sadiq (peace be upon him) said: Between boys and women, when they reach the age of ten, separation should occur in dormitories.

✅ Based on the above narrations and others, the dormitories of boys with boys, boys with girls, girls with girls, and boys with women should be separated once these children reach the age of ten lunar years and should not sleep together under the same blanket.

However, in Hadith 2⃣, Sheikh Saduq mentioned that this separation should occur at the age of six, but in other narrations, the age of ten lunar years is mentioned, which is when the child reaches the age of nine lunar years and enters the tenth year, which is approximately 8 years and 9 months solar.

Based on this, two children who have reached the age of 8 years and 9 months solar should not sleep in the same dormitory under one blanket, and parents and those around them are obligated to implement this instruction and separate their dormitories from this age onward.

✅ The purpose of separating dormitories is not that they sleep in different rooms, but rather to prevent them from sleeping together under one blanket.

اللَّهُمَّ صَلِّ عَلَی مُحَمَّدٍ وَ آلِ مُحَمَّدٍ وَ عَجِّلْ لِوَلِیِّکَ الْفَرَجَ وَ الْعَافِیَةَ وَ النَّصْر