It is narrated from Sayyiduna Abu Razin Uqayli (may Allah be pleased with him), he heard from the Messenger of Allah (peace and blessings be upon him), the Prophet (peace and blessings be upon him) said: "A dream is on the leg of a bird (and remains there) until it is interpreted, then when it is interpreted, it happens as it is interpreted." That is, just as when the bird's leg moves and it falls from its leg, so is the interpretation of a dream.