Chapter 49: Manumission of Slaves
Narrated Ibn 'Umar: The Prophet (ﷺ) said, "If one manumits his share of a common slave (Abd), and he has money sufficient
to free the remaining portion of the price of the slave (justly estimated), then he should free the slave
completely by paying the rest of his price; otherwise the slave is freed partly. "
Sahih al-Bukhari 2553