It is narrated from Sayyiduna Ka'b bin Malik (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) passed by him while he was holding on to a man over two uqiyahs (of debt). The Prophet (peace and blessings be upon him) said to the man: "Has he forgiven half (of the debt)?" The man said: Yes, O Messenger of Allah. He (peace and blessings be upon him) said (to the man): "Pay him (Ka'b) the rest of his due."
Hadith Referenceالمعجم الكبير للطبراني / باب الكاف / 16176