Malik said that he heard that Said ibn al-Musayyab, when askedabout pre-emption and whether there was a sunna in it, said, "Yes.Pre-emption is in houses and land, and it is only between partners." (FR)
USC-MSA web (English) reference: Book 35, Hadith 2 (FR)
Arabic reference (FR): Book 35, Hadith 1399 (FR)