Sayyiduna Ka'b bin Malik (may Allah be pleased with him) said: The Prophet (peace and blessings be upon him) passed by me while I was holding on to a debtor of mine. He (peace and blessings be upon him) gestured to me with his hand and said: "O Ka'b! Take half and leave half."
Hadith Referenceالمعجم الكبير للطبراني / باب الكاف / 16253