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." (IT)
USC-MSA web (English) reference: Book 35, Hadith 2 (IT)
Arabic reference (IT): Book 35, Hadith 1399 (IT)