Tawus narrates from Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) concerning a man who gives his wife two divorces, then some man marries that woman, then he divorces her or dies, then her first husband marries her: he will now have the right to three divorces.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الخلع والطلاق / 15142