Musnad Ahmad 1143:1

Muhammad ibn Ja‘far narrated to us, Shu‘bah narrated to us, from Khalid—meaning al-Hadhdha’—from Abu Bishr al-‘Anbari, from Ibn al-Talab, from his father, from the Prophet (peace and blessings of Allah be upon him): That a man emancipated a share he owned of a slave, and the Prophet (peace and blessings of Allah be upon him) did not hold him liable for the rest. Thus Ghundar said: Ibn al-Thalab, but it is actually: Ibn al-Talab. Shu‘bah had a slight impediment in his speech—meaning a lisp—and perhaps Ghundar did not understand him correctly.