Muwatta Malik, Book 36, Hadith 42 (USC-MSA) ⓘ
Malik related to me from Da'ud ibn al-Husayn from Abu Ghatafan ibn Tarif al-Muriyi that Umar ibn al-Khattab said, "If someone gives a gift to strengthen ties with a relative or as sadaqa, he cannot have it returned. If some one, however, gives a gift seeking by it favour or reward, he has his gift and can reclaim it if he does not have satisfaction from it." Yahya said that he heard Malik say, "The generally agreed-on way of doing things in our community is that if the gift is returned to the one who gave it for recompense, and its value has been either increased or decreased, the one to whom it has been given gives the owner its value on the day he received it."
حَدَّثَنِي مَالِكٌ، عَنْ دَاوُدَ بْنِ الْحُصَيْنِ، عَنْ أَبِي غَطَفَانَ بْنِ طَرِيفٍ الْمُرِّيِّ، أَنَّ عُمَرَ بْنَ الْخَطَّابِ، قَالَ مَنْ وَهَبَ هِبَةً لِصِلَةِ رَحِمٍ أَوْ عَلَى وَجْهِ صَدَقَةٍ فَإِنَّهُ لاَ يَرْجِعُ فِيهَا وَمَنْ وَهَبَ هِبَةً يَرَى أَنَّهُ إِنَّمَا أَرَادَ بِهَا الثَّوَابَ فَهُوَ عَلَى هِبَتِهِ يَرْجِعُ فِيهَا إِذَا لَمْ يُرْضَ مِنْهَا . قَالَ يَحْيَى سَمِعْتُ مَالِكًا يَقُولُ الأَمْرُ الْمُجْتَمَعُ عَلَيْهِ عِنْدَنَا أَنَّ الْهِبَةَ إِذَا تَغَيَّرَتْ عِنْدَ الْمَوْهُوبِ لَهُ لِلثَّوَابِ بِزِيَادَةٍ أَوْ نُقْصَانٍ فَإِنَّ عَلَى الْمَوْهُوبِ لَهُ أَنْ يُعْطِيَ صَاحِبَهَا قِيمَتَهَا يَوْمَ قَبَضَهَا .
also referenced under: Book 36, Hadith 1445 (In-Book)
Yahya said that he heard Malik say, "The way of doing things in our community about which there is no dispute, is that if a man gives sadaqa to his son - sadaqa which the son takes possession of or which is in the father's keeping and the father has had his sadaqa witnessed, he cannot take back any of it because he cannot reclaim any sadaqa." Yahya said that he heard Malik say, "The generally agreed-on way of doing things in our community in the case of someone who gives his son a gift or grants him a gift which is not sadaqa is that he can take it back as long as the child does not start a debt, which people claim from him, and which they trust him for on the strength of the gift his father has given him. The father cannot take back anything from the gift after debts are started against it. "If a man gives his son or daughter something and a woman marries the man, and she only marries him for the wealth and the property which his father has given him and so the father wants to take that back, or, if a man marries a woman whose father has given her a gift and he marries her with an increased bride-price because of the wealth and property that her father has given, then the father says, 'I will take that back,' then the father cannot take back any of that from the son or daughter if it is as I have described to you."