Narrated 'Amr b. Shu'aib:

On his father's authority, told that his grandfather reported the Prophet (ﷺ) said: If any slave entered into an agreement to buy his freedom for one hundred uqiyahs and he pays them all but ten, he remains a slave (until he pays the remaining ten); and if a slave entered into an agreement to purchase his freedom for one hundred dinars, and he pays them all but ten dinars, he remains a slave (until he pays the remaining ten).

Abu Dawud said: This narrator 'Abbas al-Jariri is not the same person. They said: It is misunderstanding. He is some other narrator.