Jabir bin Abdullah reported,

The wife of Bashir said, "Give my son your slave as a gift and have the Messenger of Allah ﷺ serve as witness for me."So Bashir went to the Messenger of Allah ﷺ and said, "The daughter of so-and-so has asked me to give her son a slave of mine as a gift, and she said, 'Have the Messenger of Allah ﷺ serve as witness for me.'"The Messenger of Allah ﷺ asked, "Does he have brothers?"Bashir replied, "Yes."He asked, "Have you given each of them the same as what you have given him?"Bashir said, "No."He said, "This is not proper, and I will only bear witness to what is right."

Muslim 4187

Sahih

حدثنا أحمد بن عبد الله بن يونس حدثنا زهير حدثنا أبو الزبير

عن جابر قال

قالت امرأة بشير انحل ابني غلامك وأشهد لي رسول الله ﷺ فأتى رسول الله ﷺ فقال إن ابنة فلان سألتني أن أنحل ابنها غلامي وقالت أشهد لي رسول الله ﷺ فقال أله إخوة قال نعم قال أفكلهم أعطيت مثل ما أعطيته قال لا قال فليس يصلح هذا وإني لا أشهد إلا على حق

مسلم 4187صحيح
Contents
Reference
Commentary
Ayat
Collection
Sahih Muslim
Book
Gifts
Chapter
Disapproval of favoring some children over others in gifts
Numbering
Darussalam 4187
Muslim 4187