Sahih Bukhari | Volume 3 | Hadith Number 323

Narrated by Hakim bin Hizam
The Prophet said, "The buyer and the seller have the option of cancelling or confirming the bargain unless they separate, and if they spoke the truth and made clear the defects of the goods, them they would be blessed in their bargain, and if they told lies and hid some facts, their bargain would be deprived of Allah's blessings."