Hammad bin Zayd حماد بن زيد بن درهم الأزدي الأزرق · The Chapters on Manumission (of Slaves)

“O Umair, I have set you free in a good way. I heard the Messenger of Allah (ﷺ) say: 'Any man who frees a slave and does not say anything about his (the slave's) wealth, it belongs to him (the slave).' So tell me, how much wealth do you have?” Another chain reports a similar hadith.