It was narrated from Abu Barzah Al-Aslami that the Messenger of Allah (ﷺ) said:
"The two parties to a transaction have the choice (of annulling it) so long as they have not yet parted." (DE)
English reference (DE): Vol. 3, Book 12, Hadith 2182 (DE)
Arabic reference (DE): Book 12, Hadith 2266 (DE)