Sayyiduna Anas bin Malik (may Allah be pleased with him) narrates: The Prophet (peace and blessings be upon him) said: "The dream of a believer is one part of the seventy parts of prophethood."
Al-Tabarani recorded it in al-Mu'jam al-Awsat; its chain contains a narrator, Muhammad bin Ubaydullah al-Arzami, who is da'if (weak).
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب التعبير / 11725