It is narrated from Nu’man bin Bashir (may Allah be pleased with him) that his father brought him to the Messenger of Allah (ﷺ) and said: “I have given this son of mine a slave as a gift.” The Messenger of Allah (ﷺ) asked: “Have you given a similar slave to your other sons as well?” He replied: “No.” Thereupon the Messenger of Allah (ﷺ) said: “Then take it back from him.” Abu al-Abbas stated that all of our companions have this narration through Imam Malik (may Allah have mercy on him), so I have narrated it with some doubt.
Hadith Referenceمسند الإمام الشافعي / كتاب صدقة التطوع والهبة وصلة الوالد والأخ المشرك / 1057
Hadith Takhrijاخرجه البخارى الهبة وفضلها ، باب الهبة للولد (2586) ومسلم، الهبات، باب كراهة تفضيل بعض الأولاد في الهبة (1623)۔