Sa'd bin Hisham (may Allah have mercy on him) said that Sayyiduna Zayd bin Thabit (may Allah be pleased with him) considered the words 'bariyyah', 'haram' and 'al-battah' to be equivalent to three divorces.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الخلع والطلاق / 15018