The Prophet ﷺ forbade the sale of the right of patronage and its gifting.I asked, "Did you hear this from Ibn Umar?"He replied, "Yes, and his son Hamza also asked him about it."
حدثنا عفان حدثنا شعبة أخبرني عبد الله بن دينار
عن النبي ﷺ قال نهى عن بيع الولاء وعن هبته قال قلت سمعت من ابن عمر قال نعم وسأله عنه ابنه حمزة
Its isnad is sahih, and it is a repeat of 5496. The addition of the word "you" is confirmed in the marginal note of the copy M. In H it reads "I heard him," while we have adopted what is in K and M.