Hadith #3360 (Sahih al-Bukhari)
Book: Virtues and Merits of the Prophet (pbuh) and his Companions
Narrator(s): Wathla bin al-'Asqa'
Grade: Sahih

Allah’s Messenger (ﷺ) said, “Verily, one of the worst lies is to claim falsely to be the son of someone other than one’s real father, or to claim to have had a dream one has not had, or to attribute to me what I have not said.”

Source: https://parallelquran.com/hadith/sahih-al-bukhari-3360/