Gift in Hadith

Disapproval of buying the donated property by the donor himself:

'Umar bin Al-Khattab, may Allah be pleased with him, reported: I donated a pedigree horse in the path of Allah. Its possessor made it languish. I thought that he would sell it at a cheap price. I asked Allah's Messenger (may peace be upon him) about it, whereupon he said: Don't buy it and do not get back your Charity, for one who gets back the Charity is like a dog which swallows its vomit

Ibn 'Umar, may Allah be pleased with them, reported: 'Umar bin Al-Khattab donated a horse in the cause of Allah. then, he found it offered for sale, and he wanted to buy it. thereupon, he asked Allah's Messenger (may peace be upon him) about that, whereupon he said: Do not buy it and do not take your Charity back

Prohibition of getting back charity and gift after delivery except in case of the father's donation to his child and grand child:

Ibn 'Abbas, may Allah he pleased with them, reported: Allah's Apostle (may peace be upon him) said this: He who gets back his Charity is like a dog which vomits, and then returns to that and eats it

Ibn 'Abbas, may Allah be pleased with them, reported: Allah's Messenger (may peace be upon him) said: The similitude of one who gives a Charity and then gets it back is like that of one who vomits and then eats his vomit

Disapproval of giving preference to some children while making donation:

Nu'man bin Bashir, may Allah be pleased with them, reported: His father brought him to Allah's Messenger (may peace be upon him) and said: I have donated this son of mine a slave. Allah's Messenger (May peace be upon him) said: Have you donated to every one of your sons (a slave) like this? He said: No. Thereupon Allah's Messenger (may peace be upon him) said: Then take him back

Al Umrah (life grant):

Jabir bin 'Abdullah, may Allah be pleased with them, reported: Allah's Messenger (may peace be upon him) said: Whoever is gifted a life grant, then it is for him (belongs to him and to his posterity, for it belongs to him who has been given it). It would not return to him who gave it for he conferred it as a gift (it becomes the property of the donee and as such) rules of inheritance will apply to it

Abu Hurairah, may Allah be pleased with him, reported: Allah's Apostle (may peace be upon him) said: Life grant is permissible.