Sayyiduna Abdullah bin Zaid bin Abd Rabbah (may Allah be pleased with him) narrates that the Messenger of Allah (peace and blessings of Allah be upon him) said to him: "This dream is true, Insha’Allah." Then the Prophet (peace and blessings of Allah be upon him) ordered for the call to prayer (Adhan), so Sayyiduna Bilal (may Allah be pleased with him), the freed slave of Sayyiduna Abu Bakr (may Allah be pleased with him), used to call the Adhan with these words.