Mukhtasar Muslim

Sayyiduna Anas (may Allah be pleased with him) narrates that a man called another man at the place of Baqi, saying, "O Abu al-Qasim!" The Messenger of Allah (peace and blessings be upon him) looked towards him, so the man said, "O Messenger of Allah! I did not call you, I called that person (his kunyah must also have been Abu al-Qasim)." So the Prophet (peace and blessings be upon him) said, "Name yourselves with my name, but do not take my kunyah."