Narrated ath-Thalabb: On the authority of his father: A man emancipated his share in a slave. The Prophet ﷺ did not put the responsibility on him to emancipate the rest. Ahmad said: The name Ibn al-Thalabb is to be pronounced with a ta' (and not with tha). As Shu'bah could not pronounce ta, he said tha.
The Prophet Muhammad was known for his justice and fairness in all matters, including those involving slavery. He taught us that even if someone has only partially freed a slave, they are still not responsible for freeing the rest; this shows us how important it is to treat people with respect and kindness regardless of their circumstances or status in life.