Abu Salamah bin Abdur-Rahman bin Awf (may Allah have mercy on him) says that Sayyiduna Abdur-Rahman bin Awf (may Allah be pleased with him) gave his wife a battah (irrevocable) divorce during his final illness, and Sayyiduna Uthman (may Allah be pleased with him) made her an heir after her iddah had ended.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الخلع والطلاق / 15126