Jabir bin Abdullah reported,

The wife of Bashir said, "Give my son your slave-boy as a gift, and have the Messenger of Allah ﷺ act as a 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-boy of mine as a gift, and she said, 'Have the Messenger of Allah ﷺ act as a 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 you have given him?"Bashir replied, "No."He said, "This is not proper, and I will only bear witness to what is right."

Azami 5993

Sahih

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.

الأعظمي 5993صحيح
Contents
Reference
Commentary
Ayat
Collection
Jami al-Kamil
Book
Gifts, presents, umra, and ruqba
Section
Fairness among children in gifts
Numbering
Jami al-Kamil 5993 (2nd edition)
Azami 5993