Sayyiduna Ibn Abbas (may Allah be pleased with them both) narrates that a person once presented the daughter of Sayyiduna Hamza (may Allah be pleased with him) for marriage in the court of the Messenger of Allah (peace and blessings be upon him). The Prophet (peace and blessings be upon him) said: "She is my foster niece, and all those relationships become unlawful due to suckling which become unlawful due to lineage."