Sayyiduna Ali (may Allah be pleased with him) said: When Sayyiduna al-Hasan was born, I named him Harb. Then the Messenger of Allah (peace and blessings be upon him) came and said: "Show me my son. What have you named him?" I said: Harb. He said: "No, rather he is Hasan." Then when Sayyiduna al-Husayn was born, we named him Harb. The Messenger of Allah (peace and blessings be upon him) came and said: "Bring my son to me. What have you named him?" I said: Harb. He said: "No, rather he is Husayn." Then when the third son was born, I named him Harb. The Messenger of Allah (peace and blessings be upon him) came and said: "Show me my son. What have you named him?" I said: Harb. He said: "No, rather he is Muhassin." Then he said: "I have named them after the names of the children of Harun (peace be upon him): Shabbar, Shubayr and Mushabbir."
Hadith Referenceالمعجم الكبير للطبراني / باب الحاء / 2760