Salim relates that Marwan kept sending messages to Hafsah (may Allah be pleased with her) about the Mushaf from which the Qur'an had been copied, but Hafsah (may Allah be pleased with her) kept refusing to give it to him. When we had buried Hafsah (may Allah be pleased with her), Marwan sent a message to Ibn Umar (may Allah be pleased with them both): Send me that Mushaf. So he sent that Mushaf to him.
Hadith Referenceالمعجم الكبير للطبراني / مسند النساء / 19614