Sayyiduna Ibn Umar (may Allah be pleased with them both) narrates that the Noble Prophet (peace and blessings be upon him) said: Trim this hair and leave that. The intention of the Prophet (peace and blessings be upon him) was that the hair of the upper lip should be trimmed and the hair between the lower lip and the chin should be left (because they are part of the beard; these hairs are called "daadhi bachcha").