Hazrat Sa’d bin Abi Waqqas (may Allah have mercy on him) narrates that on the occasion of the Battle of Tabuk, the Messenger of Allah (peace and blessings be upon him) appointed Hazrat Ali (may Allah be pleased with him) as his deputy. So he (may Allah be pleased with him) said: O Messenger of Allah (peace be upon him)! Are you leaving me among women and children? Upon this, the Prophet (peace and blessings be upon him) said: Are you not pleased that you are to me as Harun (peace be upon him) was to Musa (peace be upon him)?