My father took me to the Prophet ﷺ to have him witness something he had given me.The Prophet ﷺ asked, "Do you have any other children besides him?"He said, "Yes," gesturing with his entire hand like this.The Prophet ﷺ said, "Should you not treat them all equally?"
أخبرنا عبيد الله بن سعيد عن يحيى عن فطر قال حدثني مسلم بن صبيح قال سمعت
ذهب بي أبي إلى النبي ﷺ يشهده على شيء أعطانيه فقال ألك ولد غيره قال نعم وصف بيده بكفه أجمع كذا ألا سويت بينهم
No references are available.
[Its isnad is sahih] Ahmad narrated it: 4/268, 276, from the hadith of Fitr bin Khalifa, by the same route, and it is also in al-Kubra, no. 6512.