Musnad Ahmad 289:2

Bahz narrated to us, he said: Hammad ibn Salamah narrated to us, from Ya'la ibn 'Ata, from Waki' ibn Hudus, from his paternal uncle Abu Razin, from the Prophet, peace and blessings of Allah be upon him, who said: "The vision is suspended upon the leg of a bird as long as its owner does not speak of it. If he speaks of it, it falls. And do not speak of it except to a scholar, or a sincere advisor, or a person of intelligence." "And the righteous vision is one part of forty parts of prophethood."