Musnad Ahmad 1007:67

Muhammad ibn Ja’far and Hajjaj narrated to us, they said: Shu’bah narrated to us, from ‘Abd Rabbih—and Hajjaj said: from ‘Abd Rabbih—from Abu Salamah, who said: "I used to see a dream that would make me ill." He said: "Then I met Abu Qatadah, and he said: 'I too used to see a dream that would make me ill, until I heard the Messenger of Allah (ﷺ) say: "The righteous dream is from Allah. If one of you sees what he loves, let him not relate it except to one whom he loves. And if he sees what he dislikes, let him spit to his left three times, and let him seek refuge in Allah from the Shaytan and from its evil, and let him not relate it to anyone, for it will not harm him."'" Hajjaj said: Shu’bah said: "So I said to him: 'And let him seek refuge in Allah from the Shaytan?' He said: 'Yes.'"