When someone dreams of something he dislikes, he should not tell it to anyone nor mention it
Abdullah ibn Khabbab related from Abu Sa’id al-Khudri that he heard the Messenger of Allah, may Allah bless him and grant him peace, say, “When one of you has a dream he likes, it is from Allah and so he should praise Allah for it and tell it to others. When he sees other than that which he dislikes, it is from Shaytan and should seek refuge from its evil and not mention it to anyone. It will not harm him.”
Abdu Rabbihi ibn Sa’id said, “I heard Abu Salama say, ‘I used to have a dream which would make me ill until I heard Abu Qatada say, I used to have a dream which would make me ill until I heard the Prophet , may Allah bless him and grant him peace, say, ‘A good dream is from Allah. When some of you sees what he likes, he should only tell it to those he loves. If he sees what he dislikes, he should seek refuge with Allah from its evil and from Shaytan and should spit three times and should not tell it to anyone. It will not harm him.