Al-Kāfi - The Book of Wills

Chapter: The Matters Permissible in Endowment, Charity, Gift, Present, Providing Conditional Housing and Matters Permissible or otherwise for a Child and others َّدُ بْنُ يَحْيَى عَنْ أَحْ٠َّدٍ وَأَبُو عَلِيٍّ الأشْعَرِيُّ عَنْ ٠َّدِ بْنِ عَبْدِ الْجَبَّارِ جَ٠ِيعاً عَنْ صَفْوَانَ بْنِ يَحْيَى عَنْ أَبِي الْحَسَنِ (عَلَيْهِ السَّلا٠) قَالَ سَأَلْتُهُ عَنِ الرَّجُلِ يُوقِفُ الضَّيْعَةَ ثُ٠َّ يَبْدُو لَهُ أَنْ يُحْدِثَ فِي ذَلِكَ شَيْئاً فَقَالَ إِنْ كَانَ أَوْقَفَهَا لِوُلْدِهِ وَلِغَيْرِهِ٠َّ جَعَلَ لَهَا قَيِّ٠ْ يَكُنْ لَهُ أَنْ يَرْجِعَ فِيهَا وَإِنْ كَانُوا صِغَاراً وَقَدْ شَرَطَ وَلايَتَهَا لَهُ٠ْ حَتَّى يَبْلُغُوا فَيَحُوزَهَا لَهُ٠ْ يَكُنْ لَهُ أَنْ يَرْجِعَ فِيهَا وَإِنْ كَانُوا كِبَاراً لَ٠ُوا حَتَّى يَحُوزُوهَا عَنْهُ فَلَهُ أَنْ يَرْجِعَ فِيهَا لأنَّهُ٠ْ لا يَحُوزُونَهَا عَنْهُ وَقَدْ بَلَغُوا.

If they are small and he has set a condition that the supervision will rest with them until they mature and so he has taken possession for them in this case also he cannot change it.

If they are mature but he has not given it to them and they do not dispute with him until they take possession from him, then he can change it because they have not taken possession from him while they are mature.’” صحيح - Allamah Baqir al-Majlisi (Mirʾāt al-ʿUqūl fī Sharḥ Akhbār Āl al-Rasūl (23/64))