Yahya bin Sa'id al-Ansari يحيى بن سعيد الأنصاري · General Behavior (Kitab Al-Adab)

When the time draws near, a believer’s vision can hardly be false. The truer one of them is in his speech, the truer he is in his vision. Visions are of three types: Good visions are glad tidings from Allah, a terrifying vision caused by the devil, and the ideas which come from within a man. So when one sees anything he dislikes, he should get up and pray, and should not tell it to the people. He said :…